Thank you for your reply. As I stated previously, I had used DDU to remove and then installed using the latest AMD WHQL version. And I had been extremely careful to follow the posted instructions. I've just done the uninstall-reinstall again, following the posted instructions, and as I recall, the process is as I did it previously. I double-checked myself just to be sure. Per your note, I only use a local account with a full password, for any and all admin works - no PIN! My sig will try again, but I have doubts. Note the game doesn't Crash as such... it's just very-very painfully slow. (sigh) Thanks for your time and attention.