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WMI "Failed to initialize all required WMI classes"

Posted on 2011-09-22
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Last Modified: 2012-06-27
an online backup service I have uses WMI, which has a problem:

Failed to initialize all required classes.
Win32_Processor: Win32: cannot start a new logon session with an ID that is already in use.
Win32_WMISetting: successful
Security information: Successful
Win32_OperatingSystem: Win32: cannot start a new logon session with an ID that is already in use.

Server 03 SP2 fully patched. Was working fine until last Friday. Ran a WMIDiag from MS that generated a 5000k log file I can't make any sense out of.

Any ideas on how to fix this?
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Question by:fnillc
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Expert Comment

by:Eduardo Goicovich
ID: 36584153
check if KB979683  was installed

this breaks some wsf scripting
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Author Comment

by:fnillc
ID: 36584312
KB979683 was installed on this machine on 7/20/2010, over a year ago. The problem started last week.
KB2570947 & KB2616676 were installed last week when the problem started, but these patches are also on other servers with the same backup process & they're working fine.
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Expert Comment

by:Eduardo Goicovich
ID: 36586625
try rebuilding the repository

http://windowsxp.mvps.org/repairwmi.htm
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fnillc earned 0 total points
ID: 36588821
a simple reboot fixed it. Thanks for everyone's help.
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Author Closing Comment

by:fnillc
ID: 37704658
Rebooting the problem PC fixed the problem
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