Called and left no message.

Called back and: ..."the number you reached can not be connected or the number has been disconnected..."
The number has been spooked; just block it.

He said calling from Microsoft company, I believe it is scams.

Received call stating he was calling from Microsoft Windows company.  Said last couple of times I logged onto my computer it sent them a message that I had unknowingly downloaded a virus and he wanted to help me resolve the problem.  Wanted me to log onto my computer and he would talk me through the process to find the virus and get rid of it.  I told him I didn't have the time right now and he said he would all back in a half hour.  He said if anyone else from there called, to tell them he had my case and I should talk to him.  He called multiple more times, but I did not answer as I believe this to be a scam as well.

Calls numerous times a day and leaves no msg.  Going to block it.