Since we are August 19 now, that must be 2011?
Anyway, if you think they are the cause, it's easy to delete them. Just click the uninstall link in their $NTUninstall folders in c:\windows. I'd try one by one. You must be logged in as an administrator. And don't forget to hide the update, or it will come back automatically!
Can you tell which one it was that had this (very secure, by the way) side effect?
Kees
pc update history shows four security updates on aug 25

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