User Profile Service failed the logon

How to fix User Profile Service failed the logon error Microsoft Windows 7 and Windows Vista.

Turn off any antivirus software running on your system. Restart your PC, but if this doesn’t work you’ll need to restart again and boot into Safe mode.

Do this by pressing F8 before you see the Windows loading screen and choosing Safe Mode from the menu that appears.

Safe Mode logs you into the built-in Windows administrator account

Load all program default