I can't log on in my administrator account

When i start my computer it goes very slow, then when it says welcome, appear
a message telling me about the problem it says: "The User Profile Service
service cannot log on". Then it logg of and shut down. The only way I can
start my computer is in safe mode but i can't change my account settings.

Any help for me?
Thanks...

See if the info here helps.
http://www.vistax64.com/tutorials/13...ot-loaded.html

Before I can offer a possible solution, I need to understand on thing.
When you were in Safe Mode, you did manage to logon to your admin
account. Right or wrong ?