The problem I am having does not show up at the device manager.
When I start my comp, I may hear a strange ticking noise (only ever hear it before the OS loads), and when I start trying to do stuff, my keyboard just seems to send "enter" signals all the time. This makes writing impossible, targeting shortcuts causes multiple instances of the program to start in less than five seconds, among other "funny" things. The effect stops after I press ctrl-alt-del and choose task manager. It is also hard to test if something has solved it, because it only happens once a day. I have tried installing drivers from the internet (only mice drivers on the CD which was in the package). I had this problem before, and I even deleted everything on my drives and reinstalled windows to remove viruses.
I hope this explains it well enough