Leo gets phone calls from scam artists trying to tell him that his computer is infected. Leo Laporte says they use the Windows Event Viewer to point out all the errors on the user's computer, saying that the PC is infected. They will charge $199 and get full access to the computer and the person's credit card. Luckily, Leo didn't let them get that far and terminated the call before they got access.
Leo says that Microsoft will never call you and you shouldn't ever fall for that scam.