System32configsystemprofiledesktop Is Not Accessible, Access Denied

I am having an issue with a current update for Windows-7, my desktop became a default and i cannot load my old one. i found a solution that tells me i need to go to windowssystem32configsystemprofiledesktop and delete the default desktop and restart pc which should put everything back to normal.The problem is, is that my UAC administrator is shut down, i've tryed many ways to turn it off, but nothing allows me to, because anything that has anything to do with Administrator privilege it will only deny and block my actions, it is not a virus. on this website i found that solution, but how do i bypass Administrator privilege?Anything like a computer restore, anything that asks the administrator privilege Alot of things say : The Dependency Service or group failed to start when i click on System Restore.

Windows 7
AMD Phenom(tm) 2 x4 965 Processor, 3.4 GHz
14.0GB of ram
64-bit Operating system