I have Windows 7 RC1 and have been loving it from the start.
In the past week I have run into an issue where I can't load my user profile, typically after an update from Windows Update. I get to the login screen, enter my password, and then Windows says, "The User Profile Service failed the login. User profile cannot be loaded" and returns me to the login screen. Doing a system restore has worked the two times it has happened, however I wonder if anyone can give me some insight on what I might do to keep this happening in the future.