Boot into Safe Mode. Do this by repeatedly tapping the F8 key as the computer is starting up.
Log in, it should still work.
Click on start, then in the search bar type regedit and hit enter.
There is one line for each profile. Under each you have these three selections. Check them on the profile you want to work.
a.) That the key name doesn't end in ".bak" (remove .bak if there)
b.) That the RefCount value is 0 (change it if different)
c.) That the State value is 0 (change if different)
Once that is completed, create a secondary admin profile. Although it may not be the best security practice, for a home computer it is critical in the event of admin account failure (as Vista and Win7 are multi-user platforms and are not designed for a single user, despite being used that way in home environments)
Edited by hamluis, 26 September 2013 - 01:28 PM.
-- Windows 7 Ultimate on custom built system, Windows 10 on under powered laptop. Sophos UTM 9, Ubuntu Server and Windows Server 2008 R2. HyperV Virtualization --
"The hottest places in hell are reserved for those who in a period of moral crisis maintain their neutrality," John F. Kennedy