While it might seem convenient that a stranger calling you on the phone claims to have discovered a problem with your computer, beware that this common phone scam is designed to trick you into paying for support you may or may not even need. If you didn’t initiate the support call in the first place, things are probably not as they seem. Even if the caller’s company name sounds familiar, it is a good idea to call them back using the vendor phone number from your own bills or records to initiate contact.