Form the error itself:
Source: Userevn Category: None
Type: Error EventID: 1090
Windows couldn’t log the RSoP session status. An attempt to connect to WMi failed. No more RSoP logging will be done for this application of policy.
From a newsgroup post, from a Microsoft Engineer: “It could be that there is a problem with WMI on this machine. You can try recreating some of the WMI files using the steps below:
1 Stop the Windows Management Instrumentation (WMI) service.
2 Go to the %SystemRoot%\System32\Wbem\Repository folder.
3. Delete all of the files that are in the %SystemRoot%\System32\Wbem\Repository folder.
4 Restart the computer. The files that were deleted are recreated when the computer restarts.
The Windows Management Instrumentation service will start automatically when you restart the computer”.
Solution 2:
Some use this whenever when they have this error and it works better than deleting and refreshing the repository:
cd /d %windir%\system32.
regsvr32 /n /I userenv.dll.
cd wbem.
mofcomp scersop.mof.
gpupdate /force


it gets in the 50s, and thats the only reason.