Problems with antivirus updates from Trend Micro left some users with unusable computers late last week.

The signature update, pushed out on Friday morning, incorrectly identified key Windows system files as being infected with a Trojan. The security software quarantined these important files leaving users with unstable systems. Trend later fixed the problem by issuing updated signature definition files that avoided the false positive.

For affected users that was far from the end of their worries. They were still left with the hassle of repairing Windows and (perhaps) reinstalling their security software.

Solution: An Official Pattern Release update (5.527.50) was released on September 5, 2008, intended to resolve this issue...

If Trend Micro Internet Security has detected these files on your machine, please perform the procedure that applies to your situation: