And I suspect that someone from time to time connects to it, and watching my monitor (maybe even other information available).
If you haven't been warned under signature about what your actions on the PC can observe, then ask a question to the security service or his boss, might reveal the insider or the existence of an abuse.
There are many signs as I realized this, but one very annoying - I runs the mouse cursor in the left, then to the upper right corner.
Adjust the mouse or put it under the rug with the rag main. Glare surface on which the moving led mouse often lead to the fact that the cursor flies to the corners of the screen. Those who watch are usually connected in view mode, not management.
I suspect it admins
Security question set and all.