If your Windows XP computer has been misbehaving recently – crashing or slowing down — then there’s a chance that one or more of your critical system files may have been changed, possibly by malware or a virus. It’s easy enough to check and eliminate this from the list of possible causes. Just go to Run on the Start menu and type ‘sigverif’ and this will start the Windows File Signature Verification utility. It takes a few minutes as it cross-checks files against its database and at the end you will get a report showing any files that haven’t passed the test, along with the date they were modified, which might point to a program or application you’ve installed that’s behind the problem.  Don’t forget there are hundreds more great tips on the BootLog website at

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