I have just updated my P10 to P11 running W8.1 and now find that the - very useful feature indeed - Rollback function has disappeared from the Startup and Shutdown Settings menu. Was this intentional? What should I use in its place? The SmartGuard feature really is no adequate replacement since it does not allow the same flexibility in rolling back after each reboot. I test programs a lot and need to pretty much reset my Win each time I reboot. Can you please tell me what happened to the Rollback, thanks.