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WUAUSERV 100% CPU

Thomas Grassi
on
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Last Modified: 2016-07-21
Windows 2012 R2
SQL 2012 Enterprise
WSUS 6.3
Windows Vista Business 32 Bit

On my Windows Vista Laptop which is domain joined all of a sudden I am getting 100 % CPU all the time
After researching I found the when I stop BITS and WUAUSERV services my CPU drops to nothing.

So I did a tasklist /svc /fi "imagename eq svchost.exe and found wuauserv the fending service

I then went to the registry key

HKLM\SYSTEM\CSS\Services\WUAUSERV and changed the value from 0x20 to 0x10  but that did not help either

Then I rebuilt the Computer and put Windows 7 on it with the same results.

Then I put back on Windows Vista Business and applied all the updates via WSUS server
All was good even after Service Pack 2 was installed for Vista.

Then I found the problem

This update applied
Windows Update Agent version 7.6.7000.256  

This was installed automatically I cant seem to uninstall it.

This is what is causing the high cpu and now the computer will not report to my WSUS server

This is a 32 bit Laptop and I believe only 1 core on the CPU very low end.

But this has been working for years with no issues

Windows Update Agent version 7.6.7000.256  is the problem I know for sure

I tested this theory by doing a System Restore on the Vista computer and then the cpu went back to zero.

If I stop the services it goes back to zero

But then the policy triggers the service again every 6 hours to check for updates from wsus server and that when the cpu spikes to 100%

Can I stop the Windows Update Agent from updating?

Is there a patch or update I might be missing?


Any ideas on this


Thank you

Tom
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