How can I tell if I have a virus on my PC?

Episode 995 (1:22:06)

Tom from California

Tom fears his computer has a virus on it. He can't reboot it or do anything else other than the email. He turned it off and came back on, but he can't find the restore button. Leo says that doesn't mean Tom got a virus. It could've just crashed. He advises doing a thorough scan of his anti virus and maybe even scan with Microsoft's Malicious Software Removal Tool. He can even run an online scanner like Eset. Leo has a hunch there was a driver crash somewhere that caused it. No reason to conclude that he's been bitten. The fact is, if he's been updating Windows regularly, he really can't get a virus these days unless he cooperates.