I've seen tons of problems with Alt-Tab and the desktop cursor showing up.
But my problem is that the desktop cursor shows up without ever tabbing out. It seems like it happens when I'm running (shift) and moving (w) forward and/or turning (a).
When I do that, my computer beeps and the Windows cursor shows up. That makes it seem like a Sticky Keys problem, but I don't have Sticky Keys turned on. Is there something I'm missing?
I'm using dual monitors and have Windows 8.1.