VBS script stopped working

I have a vbs script to copy the security event log so that I can back it up. I got the code from MS and it has been working for months, but last night it stopped. The code is:

strComputer = "."
Set objWMIService = GetObject("winmgmts:" _
    & "{impersonationLevel=impersonate,(Backup,Security)}!\\" & _
        strComputer & "\root\cimv2")

Set colLogFiles = objWMIService.ExecQuery _
    ("Select * from Win32_NTEventLogFile where LogFileName='Security'")

For Each objLogfile in colLogFiles
    errBackupLog = objLogFile.BackupEventLog("c:\scripts\security.evt")
Next


When I run the script manually, I get the following error (on a command line):

C:\scripts\SecLogBackup.vbs(9, 1) (null): Cannot start a new logon session with an ID that is already in use

I suspect that a windows update changed some security permissions. Is there a way to make it work again without removing recent updates?

Thanks in advance
fisher_kingAsked:
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sirbountyCommented:
http://forums.iis.net/t/1168512.aspx seems to indicate that it's a conflict with KB980436.  Do you have that installed? Can you remove it and reboot, if so?

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fisher_kingAuthor Commented:
It turns out that sharepoint and wsus weren't working either (even though all of the services were running). I removed the update and rebooted and everything appears to be working properly again. I don't understand why I started having problems last night when the update was installed in 2010. But thanks for the help.
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VB Script

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