This number is from My Computer Works, it's a computer technicians place. I called them one Saturday morning, they didn't answer so I found somebody else. They kept my number though and this morning they called me but left no message. I called them back to let them know that I found somebody else but nobody answered.

This people are scamming people through services not need it on your computer. They start at $200.  And go down just to get you pay for something that is not necessary on your computer.
They damage my computer and blame Microsoft for directing me to them.
Be aware of their tactics.

I received a call from 480-240-9800 at 3:24 AM in SW Ohio today, 4/3/14, from this number, which woke me up.  I filed a complaint with the Do Not Call Registry, the FTC, the FCC and next is the AZ Attorney General.  

this number calls continuously Caller ID says sales sales.  No message left started before memorial weekend and everyday since.  Always about 12;30 P.M. PS TIME. I don't pick up.  anything saying "sales"  is B.S. to me.   I blocked the number today.  Hope this works.  They have called up to 8:00 p.m. my time when good shows are on.