This has been happening to me of late too. My solution is to select the control, alt, del keys and then when the options come up I select "sign out." I, of course, sign back in as me and everything seems normal. The game is gone too. Exited, like I had intended. One thing I have noticed is that there is a NEW folder in the "saves" folder called "scratch" which was never there before. The content (389 files) contains lots of .sav and .thm files of various sizes, typically XXX KB's.