User Profile Cannot Be Loaded

To solve this problem

you need to login in safe mode. To access safe mode you have to restart the computer and press F8 and login with your admin account. Then access the registry editor by typing in your run command (window+r) regedit.  

In your registry editor go to this folder HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows NT\CurrentVersion\ProfileList. Then look for the user account that is having problem usually it has the same name but the difference is it has a .bak at the end of the file name as you can see in the image below.

Next is you have to interchange the file name of both folder by renaming the first folder to .ba then the second folder will have the file name of the first one and then change the first folder to .bak instead of .ba so the result would be as seen in the image below

Then you have to modify the RefCount and State of the file name that does not have the .bak. Just right click the RefCount and State choose modify then change the value to zero (0) to both. Refer to the image below

right click RefCount choose modify

Change Value data to zero(0) press ok

  Same goes with State. After restart your computer and you can now login to your account

Note: I am using Windows 7 64 bit and it is connected to the domain.

Reference:
Microsoft Support
iYogi