If it happens with you that you trying to login to a Windows Vista machine and get the following message on screen:
The User Profile Service failed the logon. User profile cannot be loaded.
The best Forum's post to look at is this:
How to fix the Error: "The User Profile Service failed the logon. User profile cannot be loaded."
I tried the mentioned solution in that post and it worked fine for me.
Hope this helps,
Regards
Tags: Windows Vista