Thank you so much all of you, for great advice and insight in possible solutions.
Tojo, I`m so glad you posted that step by step map for me to follow
I will start tomorrow, and follow it all through, and hopefully the problem will be solved.
I must say that other than the creepy spying factor I relate to this, I have no problems with the machine in its normal functions. As you have noticed I have some troubles with copying pictures and music from my pc, but i doubt that this little folder has anything to do with it. I will bring my pc to the Uni`s pc service and let them look at it (ewww, its like sharing a personal diary almost) to get the copying problem sorted out.

Warbaby, I`m not sure if this folder is being replaced when i remove it. The folder was created by that wretched ex when copying music....<----What....can it be that the folder is the cause of the other propblem? I think it might just be a coincident...
And when i deleted all his stuff from my pc, this folder wasn`t going to let itself be deleted that easily.

I have the windows Defender program installed on my pc. Before I could start using it on campus I had to let the pc service office install security stuff and give the machine accsess to the network. It was then that windows Defender got installed. My sis cant use her computer from my flat, so its not just my name or student info they use, its the pc`s id.

Once again, Thank you all for helping me out.