OK Arnt, then I suppose that should be solved first, with the notice that one might remain :


See at the mouse pointer. I never could/can get rid of that and I don't even know what it is (maybe other people know ?). So I always disable that (see little black arrow).

What I suspect is that something is wrong in general, but I can't tell what. Bad memory is perhaps too far sought but possibly you see something in Device Manager, like unrecognized Devices.

What MoBo do you use there ?
Btw strange : I was quite convinced that you have an XXHighEnd PC, but can't find anything (invoice) about that.

Did you (need to) do anything for Driver installs etc. ?

Ok, let that be for now !
So don't touch anything.

Must think ...