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Windows Update error codes by component

This section lists the error codes for Microsoft Windows Update.

Automatic Update Errors

Error code Message Description
0x80243FFF WU_E_AUCLIENT_UNEXPECTED There was a user interface error not covered by another WU_E_AUCLIENT_* error code.
0x8024A000 WU_E_AU_NOSERVICE Automatic Updates was unable to service incoming requests.
0x8024A002 WU_E_AU_NONLEGACYSERVER The old version of the Automatic Updates client has stopped because the WSUS server has been upgraded.
0x8024A003 WU_E_AU_LEGACYCLIENTDISABLED The old version of the Automatic Updates client was disabled.
0x8024A004 WU_E_AU_PAUSED Automatic Updates was unable to process incoming requests because it was paused.
0x8024A005 WU_E_AU_NO_REGISTERED_SERVICE No unmanaged service is registered with AU.
0x8024AFFF WU_E_AU_UNEXPECTED An Automatic Updates error not covered by another WU_E_AU* code.

Windows Update UI errors

Error code Message Description
0x80243001 WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION The results of download and installation couldn't be read from the registry due to an unrecognized data format version.
0x80243002 WU_E_INSTALLATION_RESULTS_INVALID_DATA The results of download and installation couldn't be read from the registry due to an invalid data format.
0x80243003 WU_E_INSTALLATION_RESULTS_NOT_FOUND The results of download and installation aren't available; the operation may have failed to start.
0x80243004 WU_E_TRAYICON_FAILURE A failure occurred when trying to create an icon in the taskbar notification area.
0x80243FFD WU_E_NON_UI_MODE Unable to show UI when in non-UI mode; Windows Update client UI modules may not be installed.
0x80243FFE WU_E_WUCLTUI_UNSUPPORTED_VERSION Unsupported version of Windows Update client UI exported functions.
0x80243FFF WU_E_AUCLIENT_UNEXPECTED There was a user interface error not covered by another WU_E_AUCLIENT_* error code.
0x8024043D WU_E_SERVICEPROP_NOTAVAIL The requested service property isn't available.

Inventory errors

Error code Message Description
0x80249001 WU_E_INVENTORY_PARSEFAILED Parsing of the rule file failed.
0x80249002 WU_E_INVENTORY_GET_INVENTORY_TYPE_FAILED Failed to get the requested inventory type from the server.
0x80249003 WU_E_INVENTORY_RESULT_UPLOAD_FAILED Failed to upload inventory result to the server.
0x80249004 WU_E_INVENTORY_UNEXPECTED There was an inventory error not covered by another error code.
0x80249005 WU_E_INVENTORY_WMI_ERROR A WMI error occurred when enumerating the instances for a particular class.

Expression evaluator errors

Error code Message Description
0x8024E001 WU_E_EE_UNKNOWN_EXPRESSION An expression evaluator operation couldn't be completed because an expression was unrecognized.
0x8024E002 WU_E_EE_INVALID_EXPRESSION An expression evaluator operation couldn't be completed because an expression was invalid.
0x8024E003 WU_E_EE_MISSING_METADATA An expression evaluator operation couldn't be completed because an expression contains an incorrect number of metadata nodes.
0x8024E004 WU_E_EE_INVALID_VERSION An expression evaluator operation couldn't be completed because the version of the serialized expression data is invalid.
0x8024E005 WU_E_EE_NOT_INITIALIZED The expression evaluator couldn't be initialized.
0x8024E006 WU_E_EE_INVALID_ATTRIBUTEDATA An expression evaluator operation couldn't be completed because there was an invalid attribute.
0x8024E007 WU_E_EE_CLUSTER_ERROR An expression evaluator operation couldn't be completed because the cluster state of the computer couldn't be determined.
0x8024EFFF WU_E_EE_UNEXPECTED There was an expression evaluator error not covered by another WU_E_EE_* error code.

Reporter errors

Error code Message Description
0x80247001 WU_E_OL_INVALID_SCANFILE An operation couldn't be completed because the scan package was invalid.
0x80247002 WU_E_OL_NEWCLIENT_REQUIRED An operation couldn't be completed because the scan package requires a greater version of the Windows Update Agent.
0x80247FFF WU_E_OL_UNEXPECTED Search using the scan package failed.
0x8024F001 WU_E_REPORTER_EVENTCACHECORRUPT The event cache file was defective.
0x8024F002 WU_E_REPORTER_EVENTNAMESPACEPARSEFAILED The XML in the event namespace descriptor couldn't be parsed.
0x8024F003 WU_E_INVALID_EVENT The XML in the event namespace descriptor couldn't be parsed.
0x8024F004 WU_E_SERVER_BUSY The server rejected an event because the server was too busy.
0x8024FFFF WU_E_REPORTER_UNEXPECTED There was a reporter error not covered by another error code.

Redirector errors

The components that download the Wuredir.cab file and then parse the Wuredir.cab file generate the following errors.

Error code Message Description
0x80245001 WU_E_REDIRECTOR_LOAD_XML The redirector XML document couldn't be loaded into the DOM class.
0x80245002 WU_E_REDIRECTOR_S_FALSE The redirector XML document is missing some required information.
0x80245003 WU_E_REDIRECTOR_ID_SMALLER The redirectorId in the downloaded redirector cab is less than in the cached cab.
0x80245FFF WU_E_REDIRECTOR_UNEXPECTED The redirector failed for reasons not covered by another WU_E_REDIRECTOR_* error code.

Protocol Talker errors

The following errors map to SOAPCLIENT_ERRORs through the Atlsoap.h file. These errors are obtained when the CClientWebService object calls the GetClientError() method.

Error code Message Description
0x80244000 WU_E_PT_SOAPCLIENT_BASE WU_E_PT_SOAPCLIENT_* error codes map to the SOAPCLIENT_ERROR enum of the ATL Server Library.
0x80244001 WU_E_PT_SOAPCLIENT_INITIALIZE Same as SOAPCLIENT_INITIALIZE_ERROR - initialization of the SOAP client failed possibly because of an MSXML installation failure.
0x80244002 WU_E_PT_SOAPCLIENT_OUTOFMEMORY Same as SOAPCLIENT_OUTOFMEMORY - SOAP client failed because it ran out of memory.
0x80244003 WU_E_PT_SOAPCLIENT_GENERATE Same as SOAPCLIENT_GENERATE_ERROR - SOAP client failed to generate the request.
0x80244004 WU_E_PT_SOAPCLIENT_CONNECT Same as SOAPCLIENT_CONNECT_ERROR - SOAP client failed to connect to the server.
0x80244005 WU_E_PT_SOAPCLIENT_SEND Same as SOAPCLIENT_SEND_ERROR - SOAP client failed to send a message for reasons of WU_E_WINHTTP_* error codes.
0x80244006 WU_E_PT_SOAPCLIENT_SERVER Same as SOAPCLIENT_SERVER_ERROR - SOAP client failed because there was a server error.
0x80244007 WU_E_PT_SOAPCLIENT_SOAPFAULT Same as SOAPCLIENT_SOAPFAULT - SOAP client failed because there was a SOAP fault for reasons of WU_E_PT_SOAP_* error codes.
0x80244008 WU_E_PT_SOAPCLIENT_PARSEFAULT Same as SOAPCLIENT_PARSEFAULT_ERROR - SOAP client failed to parse a SOAP fault.
0x80244009 WU_E_PT_SOAPCLIENT_READ Same as SOAPCLIENT_READ_ERROR - SOAP client failed while reading the response from the server.
x8024400A WU_E_PT_SOAPCLIENT_PARSE Same as SOAPCLIENT_PARSE_ERROR - SOAP client failed to parse the response from the server.

Other Protocol Talker errors

The following errors map to SOAP_ERROR_CODEs from the Atlsoap.h file. These errors are obtained from the m_fault.m_soapErrCode member of the CClientWebService object when GetClientError() returns SOAPCLIENT_SOAPFAULT.

Error code Message Description
0x8024400B WU_E_PT_SOAP_VERSION Same as SOAP_E_VERSION_MISMATCH - SOAP client found an unrecognizable namespace for the SOAP envelope.
0x8024400C WU_E_PT_SOAP_MUST_UNDERSTAND Same as SOAP_E_MUST_UNDERSTAND - SOAP client was unable to understand a header.
0x8024400D WU_E_PT_SOAP_CLIENT Same as SOAP_E_CLIENT - SOAP client found the message was malformed; fix before resending.
0x8024400E WU_E_PT_SOAP_SERVER Same as SOAP_E_SERVER - The SOAP message couldn't be processed due to a server error; resend later.
0x8024400F WU_E_PT_WMI_ERROR There was an unspecified Windows Management Instrumentation (WMI) error.
0x80244010 WU_E_PT_EXCEEDED_MAX_SERVER_TRIPS The number of round trips to the server exceeded the maximum limit.
0x80244011 WU_E_PT_SUS_SERVER_NOT_SET WUServer policy value is missing in the registry.
0x80244012 WU_E_PT_DOUBLE_INITIALIZATION Initialization failed because the object was already initialized.
0x80244013 WU_E_PT_INVALID_COMPUTER_NAME The computer name couldn't be determined.
0x80244015 WU_E_PT_REFRESH_CACHE_REQUIRED The reply from the server indicates that the server was changed or the cookie was invalid; refresh the state of the internal cache and retry.
0x80244016 WU_E_PT_HTTP_STATUS_BAD_REQUEST Same as HTTP status 400 - the server couldn't process the request due to invalid syntax.
0x80244017 WU_E_PT_HTTP_STATUS_DENIED Same as HTTP status 401 - the requested resource requires user authentication.
0x80244018 WU_E_PT_HTTP_STATUS_FORBIDDEN Same as HTTP status 403 - server understood the request but declined to fulfill it.
0x80244019 WU_E_PT_HTTP_STATUS_NOT_FOUND Same as HTTP status 404 - the server can't find the requested URI (Uniform Resource Identifier).
0x8024401A WU_E_PT_HTTP_STATUS_BAD_METHOD Same as HTTP status 405 - the HTTP method isn't allowed.
0x8024401B WU_E_PT_HTTP_STATUS_PROXY_AUTH_REQ Same as HTTP status 407 - proxy authentication is required.
0x8024401C WU_E_PT_HTTP_STATUS_REQUEST_TIMEOUT Same as HTTP status 408 - the server timed out waiting for the request.
0x8024401D WU_E_PT_HTTP_STATUS_CONFLICT Same as HTTP status 409 - the request wasn't completed due to a conflict with the current state of the resource.
0x8024401E WU_E_PT_HTTP_STATUS_GONE Same as HTTP status 410 - requested resource is no longer available at the server.
0x8024401F WU_E_PT_HTTP_STATUS_SERVER_ERROR Same as HTTP status 500 - an error internal to the server prevented fulfilling the request.
0x80244020 WU_E_PT_HTTP_STATUS_NOT_SUPPORTED Same as HTTP status 500 - server doesn't support the functionality required to fulfill the request.
0x80244021 WU_E_PT_HTTP_STATUS_BAD_GATEWAY Same as HTTP status 502 - the server while acting as a gateway or a proxy received an invalid response from the upstream server it accessed in attempting to fulfill the request.
0x80244022 WU_E_PT_HTTP_STATUS_SERVICE_UNAVAIL Same as HTTP status 503 - the service is temporarily overloaded.
0x80244023 WU_E_PT_HTTP_STATUS_GATEWAY_TIMEOUT Same as HTTP status 503 - the request was timed out waiting for a gateway.
0x80244024 WU_E_PT_HTTP_STATUS_VERSION_NOT_SUP Same as HTTP status 505 - the server doesn't support the HTTP protocol version used for the request.
0x80244025 WU_E_PT_FILE_LOCATIONS_CHANGED Operation failed due to a changed file location; refresh internal state and resend.
0x80244026 WU_E_PT_REGISTRATION_NOT_SUPPORTED Operation failed because Windows Update Agent doesn't support registration with a non-WSUS server.
0x80244027 WU_E_PT_NO_AUTH_PLUGINS_REQUESTED The server returned an empty authentication information list.
0x80244028 WU_E_PT_NO_AUTH_COOKIES_CREATED Windows Update Agent was unable to create any valid authentication cookies.
0x80244029 WU_E_PT_INVALID_CONFIG_PROP A configuration property value was wrong.
0x8024402A WU_E_PT_CONFIG_PROP_MISSING A configuration property value was missing.
0x8024402B WU_E_PT_HTTP_STATUS_NOT_MAPPED The HTTP request couldn't be completed and the reason didn't correspond to any of the WU_E_PT_HTTP_* error codes.
0x8024402C WU_E_PT_WINHTTP_NAME_NOT_RESOLVED Same as ERROR_WINHTTP_NAME_NOT_RESOLVED - the proxy server or target server name can't be resolved.
0x8024402F WU_E_PT_ECP_SUCCEEDED_WITH_ERRORS External cab file processing completed with some errors.
0x80244030 WU_E_PT_ECP_INIT_FAILED The external cab processor initialization didn't complete.
0x80244031 WU_E_PT_ECP_INVALID_FILE_FORMAT The format of a metadata file was invalid.
0x80244032 WU_E_PT_ECP_INVALID_METADATA External cab processor found invalid metadata.
0x80244033 WU_E_PT_ECP_FAILURE_TO_EXTRACT_DIGEST The file digest couldn't be extracted from an external cab file.
0x80244034 WU_E_PT_ECP_FAILURE_TO_DECOMPRESS_CAB_FILE An external cab file couldn't be decompressed.
0x80244035 WU_E_PT_ECP_FILE_LOCATION_ERROR External cab processor was unable to get file locations.
0x80244FFF WU_E_PT_UNEXPECTED A communication error not covered by another WU_E_PT_* error code.
0x8024502D WU_E_PT_SAME_REDIR_ID Windows Update Agent failed to download a redirector cabinet file with a new redirectorId value from the server during the recovery.
0x8024502E WU_E_PT_NO_MANAGED_RECOVER A redirector recovery action didn't complete because the server is managed.

Download Manager errors

Error code Message Description
0x80246001 WU_E_DM_URLNOTAVAILABLE A download manager operation couldn't be completed because the requested file doesn't have a URL.
0x80246002 WU_E_DM_INCORRECTFILEHASH A download manager operation couldn't be completed because the file digest wasn't recognized.
0x80246003 WU_E_DM_UNKNOWNALGORITHM A download manager operation couldn't be completed because the file metadata requested an unrecognized hash algorithm.
0x80246004 WU_E_DM_NEEDDOWNLOADREQUEST An operation couldn't be completed because a download request is required from the download handler.
0x80246005 WU_E_DM_NONETWORK A download manager operation couldn't be completed because the network connection was unavailable.
0x80246006 WU_E_DM_WRONGBITSVERSION A download manager operation couldn't be completed because the version of Background Intelligent Transfer Service (BITS) is incompatible.
0x80246007 WU_E_DM_NOTDOWNLOADED The update hasn't been downloaded.
0x80246008 WU_E_DM_FAILTOCONNECTTOBITS A download manager operation failed because the download manager was unable to connect the Background Intelligent Transfer Service (BITS).
0x80246009 WU_E_DM_BITSTRANSFERERROR A download manager operation failed because there was an unspecified Background Intelligent Transfer Service (BITS) transfer error.
0x8024600A WU_E_DM_DOWNLOADLOCATIONCHANGED A download must be restarted because the location of the source of the download has changed.
0x8024600B WU_E_DM_CONTENTCHANGED A download must be restarted because the update content changed in a new revision.
0x80246FFF WU_E_DM_UNEXPECTED There was a download manager error not covered by another WU_E_DM_* error code.

Update Handler errors

Error code Message Description
0x80242000 WU_E_UH_REMOTEUNAVAILABLE A request for a remote update handler couldn't be completed because no remote process is available.
0x80242001 WU_E_UH_LOCALONLY A request for a remote update handler couldn't be completed because the handler is local only.
0x80242002 WU_E_UH_UNKNOWNHANDLER A request for an update handler couldn't be completed because the handler couldn't be recognized.
0x80242003 WU_E_UH_REMOTEALREADYACTIVE A remote update handler couldn't be created because one already exists.
0x80242004 WU_E_UH_DOESNOTSUPPORTACTION A request for the handler to install (uninstall) an update couldn't be completed because the update doesn't support install (uninstall).
0x80242005 WU_E_UH_WRONGHANDLER An operation didn't complete because the wrong handler was specified.
0x80242006 WU_E_UH_INVALIDMETADATA A handler operation couldn't be completed because the update contains invalid metadata.
0x80242007 WU_E_UH_INSTALLERHUNG An operation couldn't be completed because the installer exceeded the time limit.
0x80242008 WU_E_UH_OPERATIONCANCELLED An operation being done by the update handler was canceled.
0x80242009 WU_E_UH_BADHANDLERXML An operation couldn't be completed because the handler-specific metadata is invalid.
0x8024200A WU_E_UH_CANREQUIREINPUT A request to the handler to install an update couldn't be completed because the update requires user input.
0x8024200B WU_E_UH_INSTALLERFAILURE The installer failed to install (uninstall) one or more updates.
0x8024200C WU_E_UH_FALLBACKTOSELFCONTAINED The update handler should download self-contained content rather than delta-compressed content for the update.
0x8024200D WU_E_UH_NEEDANOTHERDOWNLOAD The update handler didn't install the update because it needs to be downloaded again.
0x8024200E WU_E_UH_NOTIFYFAILURE The update handler failed to send notification of the status of the install (uninstall) operation.
0x8024200F WU_E_UH_INCONSISTENT_FILE_NAMES The file names contained in the update metadata and in the update package are inconsistent.
0x80242010 WU_E_UH_FALLBACKERROR The update handler failed to fall back to the self-contained content.
0x80242011 WU_E_UH_TOOMANYDOWNLOADREQUESTS The update handler has exceeded the maximum number of download requests.
0x80242012 WU_E_UH_UNEXPECTEDCBSRESPONSE The update handler has received an unexpected response from CBS.
0x80242013 WU_E_UH_BADCBSPACKAGEID The update metadata contains an invalid CBS package identifier.
0x80242014 WU_E_UH_POSTREBOOTSTILLPENDING The post-reboot operation for the update is still in progress.
0x80242015 WU_E_UH_POSTREBOOTRESULTUNKNOWN The result of the post-reboot operation for the update couldn't be determined.
0x80242016 WU_E_UH_POSTREBOOTUNEXPECTEDSTATE The state of the update after its post-reboot operation has completed is unexpected.
0x80242017 WU_E_UH_NEW_SERVICING_STACK_REQUIRED The OS servicing stack must be updated before this update is downloaded or installed.
0x80242FFF WU_E_UH_UNEXPECTED An update handler error not covered by another WU_E_UH_* code.

Data Store errors

Error code Message Description
0x80248000 WU_E_DS_SHUTDOWN An operation failed because Windows Update Agent is shutting down.
0x80248001 WU_E_DS_INUSE An operation failed because the data store was in use.
0x80248002 WU_E_DS_INVALID The current and expected states of the data store don't match.
0x80248003 WU_E_DS_TABLEMISSING The data store is missing a table.
0x80248004 WU_E_DS_TABLEINCORRECT The data store contains a table with unexpected columns.
0x80248005 WU_E_DS_INVALIDTABLENAME A table couldn't be opened because the table isn't in the data store.
0x80248006 WU_E_DS_BADVERSION The current and expected versions of the data store don't match.
0x80248007 WU_E_DS_NODATA The information requested isn't in the data store.
0x80248008 WU_E_DS_MISSINGDATA The data store is missing required information or has a NULL in a table column that requires a non-null value.
0x80248009 WU_E_DS_MISSINGREF The data store is missing required information or has a reference to missing license terms file localized property or linked row.
0x8024800A WU_E_DS_UNKNOWNHANDLER The update wasn't processed because its update handler couldn't be recognized.
0x8024800B WU_E_DS_CANTDELETE The update wasn't deleted because it's still referenced by one or more services.
0x8024800C WU_E_DS_LOCKTIMEOUTEXPIRED The data store section couldn't be locked within the allotted time.
0x8024800D WU_E_DS_NOCATEGORIES The category wasn't added because it contains no parent categories and isn't a top-level category itself.
0x8024800E WU_E_DS_ROWEXISTS The row wasn't added because an existing row has the same primary key.
0x8024800F WU_E_DS_STOREFILELOCKED The data store couldn't be initialized because it was locked by another process.
0x80248010 WU_E_DS_CANNOTREGISTER The data store isn't allowed to be registered with COM in the current process.
0x80248011 WU_E_DS_UNABLETOSTART Couldn't create a data store object in another process.
0x80248013 WU_E_DS_DUPLICATEUPDATEID The server sent the same update to the client with two different revision IDs.
0x80248014 WU_E_DS_UNKNOWNSERVICE An operation didn't complete because the service isn't in the data store.
0x80248015 WU_E_DS_SERVICEEXPIRED An operation didn't complete because the registration of the service has expired.
0x80248016 WU_E_DS_DECLINENOTALLOWED A request to hide an update was declined because it's a mandatory update or because it was deployed with a deadline.
0x80248017 WU_E_DS_TABLESESSIONMISMATCH A table wasn't closed because it isn't associated with the session.
0x80248018 WU_E_DS_SESSIONLOCKMISMATCH A table wasn't closed because it isn't associated with the session.
0x80248019 WU_E_DS_NEEDWINDOWSSERVICE A request to remove the Windows Update service or to unregister it with Automatic Updates was declined because it's a built-in service and/or Automatic Updates can't fall back to another service.
0x8024801A WU_E_DS_INVALIDOPERATION A request was declined because the operation isn't allowed.
0x8024801B WU_E_DS_SCHEMAMISMATCH The schema of the current data store and the schema of a table in a backup XML document don't match.
0x8024801C WU_E_DS_RESETREQUIRED The data store requires a session reset; release the session and retry with a new session.
0x8024801D WU_E_DS_IMPERSONATED A data store operation didn't complete because it was requested with an impersonated identity.
0x80248FFF WU_E_DS_UNEXPECTED A data store error not covered by another WU_E_DS_* code.

Driver Util errors

The PnP enumerated device is removed from the System Spec because one of the hardware IDs or the compatible IDs matches an installed printer driver. This isn't a fatal error, and the device is merely skipped.

Error code Message Description
0x8024C001 WU_E_DRV_PRUNED A driver was skipped.
0x8024C002 WU_E_DRV_NOPROP_OR_LEGACY A property for the driver couldn't be found. It may not conform with required specifications.
0x8024C003 WU_E_DRV_REG_MISMATCH The registry type read for the driver doesn't match the expected type.
0x8024C004 WU_E_DRV_NO_METADATA The driver update is missing metadata.
0x8024C005 WU_E_DRV_MISSING_ATTRIBUTE The driver update is missing a required attribute.
0x8024C006 WU_E_DRV_SYNC_FAILED Driver synchronization failed.
0x8024C007 WU_E_DRV_NO_PRINTER_CONTENT Information required for the synchronization of applicable printers is missing.
0x8024CFFF WU_E_DRV_UNEXPECTED A driver error not covered by another WU_E_DRV_* code.

Windows Update error codes

Error code Message Description
0x80070020 InstallFileLocked Couldn't access the file because it is already in use. This can occur when the installer tries to replace a file that an antivirus, antimalware or backup program is currently scanning.
0x80240001 WU_E_NO_SERVICE Windows Update Agent was unable to provide the service.
0x80240002 WU_E_MAX_CAPACITY_REACHED The maximum capacity of the service was exceeded.
0x80240003 WU_E_UNKNOWN_ID An ID can't be found.
0x80240004 WU_E_NOT_INITIALIZED The object couldn't be initialized.
0x80240005 WU_E_RANGEOVERLAP The update handler requested a byte range overlapping a previously requested range.
0x80240006 WU_E_TOOMANYRANGES The requested number of byte ranges exceeds the maximum number (2^31 - 1).
0x80240007 WU_E_INVALIDINDEX The index to a collection was invalid.
0x80240008 WU_E_ITEMNOTFOUND The key for the item queried couldn't be found.
0x80240009 WU_E_OPERATIONINPROGRESS Another conflicting operation was in progress. Some operations such as installation can't be performed twice simultaneously.
0x8024000A WU_E_COULDNOTCANCEL Cancellation of the operation wasn't allowed.
0x8024000B WU_E_CALL_CANCELLED Operation was canceled.
0x8024000C WU_E_NOOP No operation was required.
0x8024000D WU_E_XML_MISSINGDATA Windows Update Agent couldn't find required information in the update's XML data.
0x8024000E WU_E_XML_INVALID Windows Update Agent found invalid information in the update's XML data.
0x8024000F WU_E_CYCLE_DETECTED Circular update relationships were detected in the metadata.
0x80240010 WU_E_TOO_DEEP_RELATION Update relationships too deep to evaluate were evaluated.
0x80240011 WU_E_INVALID_RELATIONSHIP An invalid update relationship was detected.
0x80240012 WU_E_REG_VALUE_INVALID An invalid registry value was read.
0x80240013 WU_E_DUPLICATE_ITEM Operation tried to add a duplicate item to a list.
0x80240016 WU_E_INSTALL_NOT_ALLOWED Operation tried to install while another installation was in progress or the system was pending a mandatory restart.
0x80240017 WU_E_NOT_APPLICABLE Operation wasn't performed because there are no applicable updates.
0x80240018 WU_E_NO_USERTOKEN Operation failed because a required user token is missing.
0x80240019 WU_E_EXCLUSIVE_INSTALL_CONFLICT An exclusive update can't be installed with other updates at the same time.
0x8024001A WU_E_POLICY_NOT_SET A policy value wasn't set.
0x8024001B WU_E_SELFUPDATE_IN_PROGRESS The operation couldn't be performed because the Windows Update Agent is self-updating.
0x8024001D WU_E_INVALID_UPDATE An update contains invalid metadata.
0x8024001E WU_E_SERVICE_STOP Operation didn't complete because the service or system was being shut down.
0x8024001F WU_E_NO_CONNECTION Operation didn't complete because the network connection was unavailable.
0x80240020 WU_E_NO_INTERACTIVE_USER Operation didn't complete because there's no logged-on interactive user.
0x80240021 WU_E_TIME_OUT Operation didn't complete because it timed out.
0x80240022 WU_E_ALL_UPDATES_FAILED Operation failed for all the updates.
0x80240023 WU_E_EULAS_DECLINED The license terms for all updates were declined.
0x80240024 WU_E_NO_UPDATE There are no updates.
0x80240025 WU_E_USER_ACCESS_DISABLED Group Policy settings prevented access to Windows Update.
0x80240026 WU_E_INVALID_UPDATE_TYPE The type of update is invalid.
0x80240027 WU_E_URL_TOO_LONG The URL exceeded the maximum length.
0x80240028 WU_E_UNINSTALL_NOT_ALLOWED The update couldn't be uninstalled because the request didn't originate from a WSUS server.
0x80240029 WU_E_INVALID_PRODUCT_LICENSE Search may have missed some updates before there's an unlicensed application on the system.
0x8024002A WU_E_MISSING_HANDLER A component required to detect applicable updates was missing.
0x8024002B WU_E_LEGACYSERVER An operation didn't complete because it requires a newer version of server.
0x8024002C WU_E_BIN_SOURCE_ABSENT A delta-compressed update couldn't be installed because it required the source.
0x8024002D WU_E_SOURCE_ABSENT A full-file update couldn't be installed because it required the source.
0x8024002E WU_E_WU_DISABLED Access to an unmanaged server isn't allowed.
0x8024002F WU_E_CALL_CANCELLED_BY_POLICY Operation didn't complete because the DisableWindowsUpdateAccess policy was set.
0x80240030 WU_E_INVALID_PROXY_SERVER The format of the proxy list was invalid.
0x80240031 WU_E_INVALID_FILE The file is in the wrong format.
0x80240032 WU_E_INVALID_CRITERIA The search criteria string was invalid.
0x80240033 WU_E_EULA_UNAVAILABLE License terms couldn't be downloaded.
0x80240034 WU_E_DOWNLOAD_FAILED Update failed to download.
0x80240035 WU_E_UPDATE_NOT_PROCESSED The update wasn't processed.
0x80240036 WU_E_INVALID_OPERATION The object's current state didn't allow the operation.
0x80240037 WU_E_NOT_SUPPORTED The functionality for the operation isn't supported.
0x80240038 WU_E_WINHTTP_INVALID_FILE The downloaded file has an unexpected content type.
0x80240039 WU_E_TOO_MANY_RESYNC Agent is asked by server to resync too many times.
0x80240040 WU_E_NO_SERVER_CORE_SUPPORT WUA API method doesn't run on Server Core installation.
0x80240041 WU_E_SYSPREP_IN_PROGRESS Service isn't available while sysprep is running.
0x80240042 WU_E_UNKNOWN_SERVICE The update service is no longer registered with AU.
0x80240043 WU_E_NO_UI_SUPPORT There's no support for WUA UI.
0x80240FFF WU_E_UNEXPECTED An operation failed due to reasons not covered by another error code.
0x80070422 Windows Update service stopped working or isn't running.

Windows Update success codes

Error code Message Description
0x00240001 WU_S_SERVICE_STOP Windows Update Agent was stopped successfully.
0x00240002 WU_S_SELFUPDATE Windows Update Agent updated itself.
0x00240003 WU_S_UPDATE_ERROR Operation completed successfully but there were errors applying the updates.
0x00240004 WU_S_MARKED_FOR_DISCONNECT A callback was marked to be disconnected later because the request to disconnect the operation came while a callback was executing.
0x00240005 WU_S_REBOOT_REQUIRED The system must be restarted to complete installation of the update.
0x00240006 WU_S_ALREADY_INSTALLED The update to be installed is already installed on the system.
0x00240007 WU_S_ALREADY_UNINSTALLED The update to be removed isn't installed on the system.
0x00240008 WU_S_ALREADY_DOWNLOADED The update to be downloaded has already been downloaded.

Windows Installer minor errors

The following errors are used to indicate that part of a search fails because of Windows Installer problems. Another part of the search may successfully return updates. All Windows Installer minor codes must share the same error code range so that the caller can tell that they're related to Windows Installer.

Error code Message Description
0x80241001 WU_E_MSI_WRONG_VERSION Search may have missed some updates because the Windows Installer is less than version 3.1.
0x80241002 WU_E_MSI_NOT_CONFIGURED Search may have missed some updates because the Windows Installer isn't configured.
0x80241003 WU_E_MSP_DISABLED Search may have missed some updates because policy has disabled Windows Installer patching.
0x80241004 WU_E_MSI_WRONG_APP_CONTEXT An update couldn't be applied because the application is installed per-user.
0x80241FFF WU_E_MSP_UNEXPECTED Search may have missed some updates because there was a failure of the Windows Installer.

Windows Update Agent update and setup errors

Error code Message Description
0x8024D001 WU_E_SETUP_INVALID_INFDATA Windows Update Agent couldn't be updated because an INF file contains invalid information.
0x8024D002 WU_E_SETUP_INVALID_IDENTDATA Windows Update Agent couldn't be updated because the wuident.cab file contains invalid information.
0x8024D003 WU_E_SETUP_ALREADY_INITIALIZED Windows Update Agent couldn't be updated because of an internal error that caused setup initialization to be performed twice.
0x8024D004 WU_E_SETUP_NOT_INITIALIZED Windows Update Agent couldn't be updated because setup initialization never completed successfully.
0x8024D005 WU_E_SETUP_SOURCE_VERSION_MISMATCH Windows Update Agent couldn't be updated because the versions specified in the INF don't match the actual source file versions.
0x8024D006 WU_E_SETUP_TARGET_VERSION_GREATER Windows Update Agent couldn't be updated because a WUA file on the target system is newer than the corresponding source file.
0x8024D007 WU_E_SETUP_REGISTRATION_FAILED Windows Update Agent couldn't be updated because regsvr32.exe returned an error.
0x8024D009 WU_E_SETUP_SKIP_UPDATE An update to the Windows Update Agent was skipped due to a directive in the wuident.cab file.
0x8024D00A WU_E_SETUP_UNSUPPORTED_CONFIGURATION Windows Update Agent couldn't be updated because the current system configuration isn't supported.
0x8024D00B WU_E_SETUP_BLOCKED_CONFIGURATION Windows Update Agent couldn't be updated because the system is configured to block the update.
0x8024D00C WU_E_SETUP_REBOOT_TO_FIX Windows Update Agent couldn't be updated because a restart of the system is required.
0x8024D00D WU_E_SETUP_ALREADYRUNNING Windows Update Agent setup is already running.
0x8024D00E WU_E_SETUP_REBOOTREQUIRED Windows Update Agent setup package requires a reboot to complete installation.
0x8024D00F WU_E_SETUP_HANDLER_EXEC_FAILURE Windows Update Agent couldn't be updated because the setup handler failed during execution.
0x8024D010 WU_E_SETUP_INVALID_REGISTRY_DATA Windows Update Agent couldn't be updated because the registry contains invalid information.
0x8024D013 WU_E_SETUP_WRONG_SERVER_VERSION Windows Update Agent couldn't be updated because the server doesn't contain update information for this version.
0x8024DFFF WU_E_SETUP_UNEXPECTED Windows Update Agent couldn't be updated because of an error not covered by another WU_E_SETUP_* error code.