Caller ID just said UNKNOWN.  Call blocker got it.

They are a scam trying to tell you your computer is infected. Sounds like they are calling from South Asia by their accents.

They just keep calling and hanging up. Says number is not in service if i call it back. I'm on the national do not call list but it doesnt seem to help much.

Received a call and decided to answer it.  A man with a strong Indian accent said my computer is not taking updates that he is trying to send.  I explained that my computer is very rude and does not like to talk to other computers .... I don't think he understood.  I finally asked him why doesn't he take a "flying hike" and he hung up on me.

No answer, No background noise. I ended the call. # blocked.