function keys (shift ctrl & capslock) stuck

[alfredjodocusquack]

Hello LTT Forum!

I tried using the search function and found a few posts with similar problems.

This post came closest to my problem but the suggested solutions didnt work for me.

 

I'll try to keep it short, this is basically what's been happening:
 

After some time playing a rts game (which involves a lot of shift and ctrl usage) at apparently random instances I kept noticing that the control keys (shift ctrl and capslock) were stuck without me pressing them. When I alt tab this is the case for all applications, not just the one I was using. This makes not only the game but the whole system basically unusable. For example if I try to open my browser it just starts new windows.
I first suspected a hardware issue and replaced my keyboard, but the problem persists. I only get them unstuck by restarting the whole system at which point it gives me the bluescreen "repair your system" option.
After the restart the PC works just fine until it happens the next time while ingame. This tends to happen quite a lot so I decided to try to fix it.
I obviously have sticky keys and all the "bad" stuff deactivated in Windows. There are only 2 USB devices plugged in, the new keyboard and a mouse.


Hopefully some of you have some good ideas for me to avoid this rather annoying problem!