Windows Technical Support.  They called saying my computer has been sending them reports that my computer is acting up.

Total scam.  Common.   Do not talk to them, do not let them get into your computer.  If they call you, tell them you know it's a scam.   Originates in India most of the time.   Tell them that you are going to turn them in to the authorities.   They will probably continue to call you so you might consider getting a call blocker or just not picking up on call numbers you don't recognize.

See:   http://blog.malwarebytes.org/tech-support-scams/

I just received call from this number 206-231-4569 saying they are getting messages from my computer and it is going to crash.  I told him to take a hike and remove my phone number.