Today I was called by someone who calls himself "Windows Services"
He told me that they've seen suspicous traffic coming from my pc and that I'm not aware of that.
This could slow down my pc and to prevent this he was willing to help me.
He asked me if my pc was turned on and if I could download a file so that he can take care of the problem.
After saying to him that I didn't do it, because of the fact that he was trying to get control of my pc, he disconnected the call.
So be aware and: