This company calls repeatedly, saying that they are Microsoft, and they "must fix my computer or it will crash and I will lose all of my data".  Of course, it is a hacker, and they are only interested in gaining my personal information.
Three weeks ago, a guy called and when I didn't "give in", he became abusive, sexually explicit, and then threatened me, saying that he knew my number and could find where I lived.  He said he was going to "shut me up by shoving his XXX in my mouth".
I just received another call, and asked for a callback number...they gave me this one, and I called it back--it IS indeed the correct number.
PLEASE do not give these people your information!  I have reported it to the local police department, but they do nothing to protect the people.  I'm frustrated, but am doing what I can to help...