Currently am using Windows Vista SP1 with Updates.
Unfortunately, today morning my user profile got corrupted. [just before that, I was working with out problem and shut downed properly, but could in find the root for the cause].
While restarting, it was showing as “preparing your desktop” and then loaded a temporary profile :-( Shows the below error message,
Your user profile was not loaded correctly! You have been logged on with a temporary profile.
Changes you make to this profile will be lost when you log off. Please see the event log for details or contact your administrator.
Fortunately, my “user directory” is not deleted for my turn, at least that content was saved.
Timely got resolution for this problem in “Microsoft Support Portal”
The excerpt of the solution