Try to run system in safe mode and check build-in admin account appear -if yes login to this account and create new admin account.If built-in admin not appear you have enable it remotly:

METHOD 1
User Account Password - Change from Win RE

METHOD 2
How to Enable System Administrator
No Administrator Account

METHOD 3
Tools for reseting password also have option to enable/disable account (including built-in admin) for example http://home.eunet.no/pnordahl/ntpasswd/

Hello Marie,

If you are getting a "The User Profile Service failed the logon. User profile cannot be loaded." type error, then the tutorial below may be able to help you fix this.

The User Profile Service failed the logon. User profile cannot be loaded.

Hope this helps,
Shawn

Originally Posted by Marie

Hi there.

I have 2 profiles on my computer, one is the main admin profile, that me and
my partner use on an everyday basis, and the other was one we set up for a
friend to use while house sitting, and this is NOT an admin profile.

Yesterday, my partner tried to log onto our profile, entered the correct
password, and got the message that the user profile cannot be loaded, or
something to that effect.

What could be causing this and how can we correct it?
I have alot of files and photos that i canot loose, and work info too, and
have absolutley no access to them!

Any help is very much welcomed.
Thanks
Marie