I get calls from "the Windows company" telling me I have a virus on my PC.
I get those too. Used to be some fellow with a heavy accent would call warning me about a virus on my PC. I told
him "Yes, I know. I wrote the virus. Thank you for confirming that it works.". This was followed by about 30 seconds
of silence since he didn't know how to respond to that, then he hung up. Now I get the occasional robocall stating
that a virus has been detected on my computer and to press 1 to talk to a certified Microsoft technician.