Volume Shadow Copy Service error: Unexpected error calling routine RegOpenKeyExW
If you face below error in your application event log on your SharePoint 2010 installation, find which account is running mssearch.exe and assign full permissions on HKLM\SYSTEM\CurrentControlSet\Services\VSS\Diag to the account.
Log Name: Application
Source: VSS
Date: 7/1/2010 11:40:19 PM
Event ID: 8193
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: Sp2010Dev.colors.test
Description:
Volume Shadow Copy Service error: Unexpected error calling routine RegOpenKeyExW(-2147483646,SYSTEM\CurrentControlSet\Services\VSS\Diag,...). hr = 0x80070005, Access is denied.
.
Operation:
Initializing Writer
Context:
Writer Class Id: {0ff1ce14-0201-0000-0000-000000000000}
Writer Name: OSearch14 VSS Writer
Writer Instance ID: {311c68e7-e546-4f17-8aa4-277dd666b22e}
Event Xml:
<Event xmlns="https://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="VSS" />
<EventID Qualifiers="0">8193</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2010-07-01T20:40:19.000000000Z" />
<EventRecordID>3160</EventRecordID>
<Channel>Application</Channel>
<Computer>Sp2010Dev.colors.test</Computer>
<Security />
</System>
<EventData>
<Data>RegOpenKeyExW(-2147483646,SYSTEM\CurrentControlSet\Services\VSS\Diag,...)</Data>
<Data>0x80070005, Access is denied.
</Data>
<Data>
Operation:
Initializing Writer
Context:
Writer Class Id: {0ff1ce14-0201-0000-0000-000000000000}
Writer Name: OSearch14 VSS Writer
Writer Instance ID: {311c68e7-e546-4f17-8aa4-277dd666b22e}</Data>
</EventData>
</Event>