System: HP 290 G1 Microtower PC Processor Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz 3.40 GHz Installed RAM 8.00 GB (7.89 GB usable) Device ID EA9D01FF-A2BC-4AF7-99C6-36A4BAF78CC2 Product ID 00330-50826-60474-AAOEM System type 64-bit operating system, x64-based processor Edition Windows 10 Pro Version 21H1 Installed on ‎12/‎07/‎2021 OS build 19043.1415 Experience Windows Feature Experience Pack 120.2212.3920.0 Wifi speed drops to 0Kbps every 10 seconds or so for about 2 seconds both send and receive I have two identical USB Wifi adapters and it’s the same for both adapters but just when in this PC. Resource monitor shows the same issue What I have tried: Testing with data from the web or transferring data from my NAS on the same subnet. Both have the issue so it’s not an issue with broadband. Swapped to another identical 802.11ac USB network adaptor – they both work fine in another machine – so I don’t think the adapter is the issue. Switch to another brand adapter (802.11n only) – works fine Another PC with this adapter in the same room has no problems and is on same wifi 5GHz channel so that rules out the Wifi signal having problems. Same wifi/network setup, same driver, same update version of windows. Tried manual DNS configuration to 8.8.8.8 and 8.8.4.4 Latest update to router Latest update to Windows Latest f/w for adapters Latest BIOS for PC Turned off adapter power management Tried latest manufacturer and latest MS drivers for adapter Different USB ports tried both 2.0 and 3.0 Airplane mode on/off Router reboot (full power off) PC reboot (full power off) “Forget” and reattach to network Uninstalled VPN Reboot with all start-up programs and all non-Microsoft services disabled Link speed to router checked = 585Mbps Set the adapter as the only connection on the 5GHz channel Set the adapter as the only connection on the 2.4GHz channel Tried Static and DHCP IPV4 addressing Network RESET in settings Network troubleshooter Network Adapter Troubleshooter Incoming Connections troubleshooter Internet Connections troubleshooter HP Network Check Tried switching off local firewall Tried switching off router firewall HP Hardware diagnostics 1.8.0.0 Hardware properties: SSID: xxxxxxxx Protocol: Wi-Fi 5 (802.11ac) Security type: WPA2-Personal Network band: 5 GHz Network channel: 60 Link speed (Receive/Transmit): 585/585 (Mbps) Link-local IPv6 address: xxxx::xxxx:xxxx:xxxx:xxxxxx IPv6 DNS servers: xxxx::xxxx:xxxx:xxxx:xxxxxx IPv4 address: 192.168.1.83 IPv4 DNS servers: 192.168.1.1 DNS suffix search list: broadband Manufacturer: Realtek Semiconductor Corp. Description: Realtek 8812BU Wireless LAN 802.11ac USB NIC Driver version: 1030.38.712.2019 Physical address (MAC): 1C-BF-CE-7D-75-D4 I have spent so many hours on this - it's driving me nuts. Any input or suggestions gratefully received. Thanks in advance Nick

Hello Nick, There are lots of possible next steps, but rather than spending effort weighing the merits of each, let's just start with a simple test: Issue the command netsh trace start report=disabled overwrite=yes provider=Microsoft-Windows-WLAN-AutoConfig tracefile=why.etl . Wait 3 or so minutes. Issue the command netsh trace stop . Issue the command netsh trace convert why.etl why.txt There should be some readable information in why.txt. Looking directly at why.etl using my tools and filtering some junk, I see on my system: The events highlighted in green happened when I performed a search in Google - I have enabled Google to request my location when performing searches. I think that we will see a scan being initiated every 10 seconds on your PC and, if so, we will then have to search for the client that requested the scan. Gary

Hi Gary, Yes, that's exactly where I looked. The advanced settings were exactly the same for both pcs using identical adapters and one pc working and one not. When home I'll compare the registry values too for any settings not visible in the advanced tab. :-) Nick

Hiya Gary, Just got home - exhausted. SWMBO has invited guests for dinner so can't play :-( but wanted to touch base quickly to say thanks again and wish you a very happy new year. I checked the driver version. You are correct. Working tomorrow midday to midnight so hopefully will get a chance to delete the driver and the registry key and reinstall and see if that helps - (I will export the key first so we have a record) Gutes neues Nick :-)

Hi Gary, Good Morning Gary. Thanks for your reply. Happy New Year again I uninstalled the driver to try to ensure that when I changed driver I was actually changing to the realtek signed driver from their website. The /10 key disappeared from the registry. I reinserted the adapter and the /10 reappeared but when I checked the driver in device manager it had definitely changed to the realtek signed driver and not the MS signed one. I also tried stopping windows auto installing the driver to make sure that the /10 wasn't installed from the MS driver but the driver still auto-installed (but wasn't usable - no networks selectable from the systray even though the driver looks installed) Sorry, the above may not be very useful! I will wait for the new trace file when you have a moment. Off for a 12 hour 12-12 shift today and same tomorrow so may not get a chance to do more 'till Monday :-( Thanks again as always Nick :-)

Doh, our messages crossed - I really have to rush to work now.... sorry

Network throughput drops to 0Kbps (send and recieve) every 8 seconds, adapter fine on other PCs

Nick Brown 26

System:
HP 290 G1 Microtower PC
Processor Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz 3.40 GHz
Installed RAM 8.00 GB (7.89 GB usable)
Device ID EA9D01FF-A2BC-4AF7-99C6-36A4BAF78CC2
Product ID 00330-50826-60474-AAOEM
System type 64-bit operating system, x64-based processor
Edition Windows 10 Pro
Version 21H1
Installed on ‎12/‎07/‎2021
OS build 19043.1415
Experience Windows Feature Experience Pack 120.2212.3920.0

Wifi speed drops to 0Kbps every 10 seconds or so for about 2 seconds both send and receive
I have two identical USB Wifi adapters and it’s the same for both adapters but just when in this PC.

Resource monitor shows the same issue
What I have tried:

Testing with data from the web or transferring data from my NAS on the same subnet. Both have the issue so it’s not an issue with broadband.
Swapped to another identical 802.11ac USB network adaptor – they both work fine in another machine – so I don’t think the adapter is the issue.
Switch to another brand adapter (802.11n only) – works fine
Another PC with this adapter in the same room has no problems and is on same wifi 5GHz channel so that rules out the Wifi signal having problems. Same wifi/network setup, same driver, same update version of windows.
Tried manual DNS configuration to 8.8.8.8 and 8.8.4.4
Latest update to router
Latest update to Windows
Latest f/w for adapters
Latest BIOS for PC
Turned off adapter power management
Tried latest manufacturer and latest MS drivers for adapter
Different USB ports tried both 2.0 and 3.0
Airplane mode on/off
Router reboot (full power off)
PC reboot (full power off)
“Forget” and reattach to network
Uninstalled VPN
Reboot with all start-up programs and all non-Microsoft services disabled
Link speed to router checked = 585Mbps
Set the adapter as the only connection on the 5GHz channel
Set the adapter as the only connection on the 2.4GHz channel
Tried Static and DHCP IPV4 addressing
Network RESET in settings
Network troubleshooter
Network Adapter Troubleshooter
Incoming Connections troubleshooter
Internet Connections troubleshooter
HP Network Check
Tried switching off local firewall
Tried switching off router firewall
HP Hardware diagnostics 1.8.0.0

Hardware properties:
SSID: xxxxxxxx
Protocol: Wi-Fi 5 (802.11ac)
Security type: WPA2-Personal
Network band: 5 GHz
Network channel: 60
Link speed (Receive/Transmit): 585/585 (Mbps)
Link-local IPv6 address: xxxx::xxxx:xxxx:xxxx:xxxxxx
IPv6 DNS servers: xxxx::xxxx:xxxx:xxxx:xxxxxx
IPv4 address: 192.168.1.83
IPv4 DNS servers: 192.168.1.1
DNS suffix search list: broadband
Manufacturer: Realtek Semiconductor Corp.
Description: Realtek 8812BU Wireless LAN 802.11ac USB NIC
Driver version: 1030.38.712.2019
Physical address (MAC): 1C-BF-CE-7D-75-D4

I have spent so many hours on this - it's driving me nuts. Any input or suggestions gratefully received.

Thanks in advance

Nick

Gary Nebbett 6,091 Reputation points

2021-12-27T12:37:45.583+00:00

Hello @Nick Brown ,

Have you looked at the following posting?

https://learn.microsoft.com/en-us/answers/questions/654938/internet-speed-throttled-to-135mb.html

The problem, its resolution and the type of tracing needed to understand the problem will be different, but the poster initially tried an equally long list of measures and tracing was a useful step in the subsequent troubleshooting.

If you are willing to share trace data, let us know.

Gary

Accepted answer

Gary Nebbett 6,091 Reputation points

2022-01-03T09:05:42.89+00:00
Hello Nick,

There are lots of possible next steps, but rather than spending effort weighing the merits of each, let's just start with a simple test:

Issue the command netsh trace start report=disabled overwrite=yes provider=Microsoft-Windows-WLAN-AutoConfig tracefile=why.etl.

Wait 3 or so minutes.

Issue the command netsh trace stop.

Issue the command netsh trace convert why.etl why.txt

There should be some readable information in why.txt.

Looking directly at why.etl using my tools and filtering some junk, I see on my system:

The events highlighted in green happened when I performed a search in Google - I have enabled Google to request my location when performing searches.

I think that we will see a scan being initiated every 10 seconds on your PC and, if so, we will then have to search for the client that requested the scan.

Gary
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1 person found this answer helpful.
Gary Nebbett 6,091 Reputation points

2022-01-03T14:20:38.03+00:00

Hello Nick,

I think that the application "C:\Program Files\MiniTool ShadowMaker\SMMonitor.exe" is calling WlanScan every 10 seconds.

My guess is that the USB network adapter "pauses" transmits/receives whenever a scan is performed on all of your systems, but on the other systems there is no process regularly calling WlanScan.

A further guess would be that if you suspend or stop SMMonitor and perform a network performance test, you would see good continuous throughput.

Gary

phut phut 1 Reputation point

2022-12-02T01:54:01.737+00:00

Gary you beautiful soul.

This has been driving me insane - I WFH using a citrix remote desktop and was convinced it was Citrix screwing with my wifi adapter as it so likes to screw with everything else.

I read your solution, started running the trace and then remember I'd seen a stupid little dot in the taskbar saying microsoft were using my location.

Turned location off, WiFi issues gone isntantly.

Anyone googling this in future - switch of location services and you'll probably be fine!

ethan1k 0 Reputation points

2023-12-12T01:03:52.2333333+00:00

I've been having very similar issues, however I am just a 16 year old kid and do not understand much technology slang, besides what I've learnt in grade 10 CAT classes. Somebody please help me, this is driving me crazy.
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Nick Brown 26 Reputation points

2021-12-29T12:05:36.417+00:00

Hi Gary,

Yes, that's exactly where I looked. The advanced settings were exactly the same for both pcs using identical adapters and one pc working and one not.

When home I'll compare the registry values too for any settings not visible in the advanced tab.

:-)

Nick
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Nick Brown 26 Reputation points

2021-12-31T20:14:07.877+00:00

Hiya Gary,

Just got home - exhausted.

SWMBO has invited guests for dinner so can't play :-( but wanted to touch base quickly to say thanks again and wish you a very happy new year.

I checked the driver version. You are correct.

Working tomorrow midday to midnight so hopefully will get a chance to delete the driver and the registry key and reinstall and see if that helps - (I will export the key first so we have a record)

Gutes neues

Nick :-)
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Gary Nebbett 6,091 Reputation points

2021-12-31T21:21:50.573+00:00

Hello Nick,

Kudos - not only some impressive IT skills but German too :-)

I will send an updated .wprp file that can hopefully squeeze some more information of of the rtwlanu,sys driver tomorrow; I waited until now (tomorrow) in case any new ideas occurred to me.

Here's hoping that 2022 is a bit less tiring for everyone in healthcare...

Gary

Gary Nebbett 6,091 Reputation points

2022-01-01T10:08:59.443+00:00

Hello Nick,

The attached file is a replacement for the original sched.wprp file and the test is the same (trace until a pause/hiccup in the ping test).

This .wprp enables the 6 WPP (Windows software trace PreProcessor) event providers in rtwlanu.sys. WPP events are normally not of much use to anyone but the software developer, but I hope that the trace might give at least a little more insight into the network adapter interrupt behaviour.

Gary

161579-schedwprp.txt
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Nick Brown 26 Reputation points

2022-01-01T10:30:44.217+00:00

Hi Gary,

Good Morning Gary.

Thanks for your reply.

Happy New Year again

I uninstalled the driver to try to ensure that when I changed driver I was actually changing to the realtek signed driver from their website. The /10 key disappeared from the registry. I reinserted the adapter and the /10 reappeared but when I checked the driver in device manager it had definitely changed to the realtek signed driver and not the MS signed one. I also tried stopping windows auto installing the driver to make sure that the /10 wasn't installed from the MS driver but the driver still auto-installed (but wasn't usable - no networks selectable from the systray even though the driver looks installed)

Sorry, the above may not be very useful! I will wait for the new trace file when you have a moment.

Off for a 12 hour 12-12 shift today and same tomorrow so may not get a chance to do more 'till Monday :-(

Thanks again as always

Nick
:-)
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Nick Brown 26 Reputation points

2022-01-01T10:31:37.637+00:00

Doh, our messages crossed - I really have to rush to work now.... sorry
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Network throughput drops to 0Kbps (send and recieve) every 8 seconds, adapter fine on other PCs

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