He wanted me go to computer because of Windows trouble that I don't have, I told him I don't know much about computers

Didn't answer the phone, but apparently these people have a way to "double call", which doubles the number of times the phone rings before the answering machine picks up.  Of course, they left no message.

This number called stating I had issues with my computer and would walk me step by step over the phone how to fix it. Obvious scam

No message left on machine so do not call back

Received a call from David saying that my computer downloaded malicious files 9pm-2am last night.  Neither of my computers were on at that time.  He gave me an Windows ID Number with a lot of alpha-numeric digits.  He wants to call me back tonight when I get home from work.  I suspected this was phishing and after reading the other comments, I will not answer his call.