Called my cell phone, I had gotten these Microsoft calls before from other numbers. Hung up on him telling him that this I knew it was a sales call and blocked the number.

I get calls from them at least once a month. Once they said my computer was sending them error messages and I had to laugh and tell them my computer has been off and unplugged for days due to sever lightening storms. Said it was still sending messages. Sometimes they change it and say I have a virus. I told them my son works for Microsoft and if I have an issue, he would be the one to fix it. One lady even as far as to tell me that she didnt care what department he was in at Mircrosoft, he didnt know what she knew and if I wanted to chance my computer crashing,it would be my problem then. OMG, really? Do they think we are that stupid and gullible. Some days i play along to waste their time and some days I answer like i would my business.  they hang up.  They dont give up, and neither should we!

Strange or Coincidence?
A lot of times when I have contacted Microsoft, via a chat session, I get follow-up calls from someone claiming to be one of their techies.Are our activities being leaked out?

This is a scam. Microsoft does NOT call people and ask to get into your computer. Don't talk to these people. They are usually calling from the Far East (India, etc.) but will give you a fake, "American-sounding" name. They can get very aggressive and nasty when confronted.

I once told them I was "too old to handle a computer," and the guy argued with me, saying, "Your are NOT old! Your voice is too strong to be old!!"  We're getting these calls multiple times a week, sometimes several a day. They have absolutely no right to know whether or not you even own a computer--just tell them you don't. (But, I tried that, and it didn't work either--they are pretty determined to mine your personal information off your computer.)