This caller called my mother and told her to "shut up *****" after saying he was calling to diagnose her computer. She asked to speak to a supervisor, then he came back to phone pretending to be the supervisor, ultimately hanging up on her after saying "**** you *****." She tried to call the number back and it wouldn't work. I called from another number and someone answered, but this time it wasn't a message, I could tell it was a live person.
A Male with an Indian accent claiming my computer was sending a virus via my windows operating system. When questioned very aggressively told me to get in front of my computer so he "could help me out!". I hung up.
A very aggressive woman with heavily accented English warning me about a problem with my computer. Wanted me to do a control-r. Did not do, but the same number called back twice, after changing the id on the phone number.