Long time user of bleeping computer - gonna jump on in and join the fun and games!
Anyway I work in a small local computer repair shop and recently we had LOADS of Vista and Windows 7 machines with the error
"The User Profile Service failed the logon. User profile cannot be loaded"
We can repair the fault changing the profile from temporary profile path and swapped the .bak extension in registry.
But what the hell is causing it? We have had two machine back in within two weeks of initial repair. We figured windows update at first but its not a given.