Phone call stating that they are from Microsoft and that the computer has been hacked. They were "contracted out" to solve the issue. Looked them up on ScamPulse.com and they get an "F" for scamming customers into sending them money to fix a problem the customer does not have. They ask for access to your computer so that they can "fix" the problem. They plant infected files into to the computer. Do not open anything and get your computer fixed asap.