Virtual key stuck down even if keyboard is unplugged

Hi,

I am periodically experiencing an issue where the o button starts typing itself continuously until I either restart or lock the PC. It's not a keyboard issue, since it happens whether the keyboard is plugged in or not, even with a different keyboard.

Is there a way of finding out which application is sending these keypresses?

I haven't yet found a way of triggering it, but once it starts, it happens quite often after each time I stop it.

Please ask if you need any more info.

Thanks!

Disregard my fix would only be for a laptop

OP said he tried another keyboard.

Any other USB devices plugged in, maybe something is faulty that is emulating a keyboard. Have you tried another mouse?

Did you ever find a solution to this?