Same, called regarding ' dangerous software on my computer'  I said I didn't have one. they have called back twice since...

These Guys are SCAMMERS claim to have a infected PC (BS) if it was antivirus would pick it up...........also claim to be calling representing Microsoft .....Microsoft doesn't call you if ur pc is infected Number Reported to local Law Enforcement

Claims that my computer is infected and that I should provide access to my PC. He would not disclosed his location.
No questions that this individual or group wanted access to my files. Be aware of it