Question : Windows 7 Update Error

Windows 7 64 bit

I am getting this error now

Type :            Error
Date :            7/11/2010
Time :            2:22:07 AM
Event :            4107
Source :            Microsoft-Windows-CAPI2
Category :      None
User :            N/A
Computer :      TGKW001.our.network.tgcsnet.com
Description:
Failed extract of third-party root list from auto update cab at: <http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab> with error: A required certificate is not within its validity period when verifying against the current system clock or the timestamp in the signed file.
.

I do not know why this pc is going to windows update site I have a Windows 2003 server running WSUS 3.1 which all my machines update from

Any ideas

Answer : Windows 7 Update Error

Check certificate manager...
One of the certificates required in the process has expired. Renew what's expired.Double-check system clocks, making sure time is current.
similar :
http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/2003_Server/Q_22805276.html