This is ridiculous and I don't expect you to do anything about it, but I thought you'd like to know. I've been experiencing an issue usually close to the end of the day where my keyboard breaks and I have to restart Windows. I've finally realised it's when I close the Spine editor, the keyboard locks up and windows beeps whenever I type.
I had Unity open and the Hand tool was being force-selected, the shortcut for that is Q. Dunno if that's a cause?
Anyway it's a cheap wireless keyboard and I'm happy to send over details if you think it's important. As I said, it's one of those stupid software/ hardware bugs that'll be impossible to diagnose, but I thought I'd pass it on anyway