Windows 7 Error: User profile cannot be loaded

* Start Windows 7 into Advanced Boot Options (tap repeatedly F8 during startup)
* Select Safe Mode with Command Prompt
* Enable administrator account, reset its password if needed:
– enable:
net user administrator /active:yes
– enable + reset password:
net user administrator newpass /active:yes
* Start Windows 7 normally
* Login as administrator
* Open regedit
* Go to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList
* Rename S1-xxx-xxx to S1-xxx-xxx.timestamp, e.g. S1-xxx-xxx.092518
* Rename S1-xxx-xxx.bak to S1-xxx-xxx
* Check a new S1-xxx-xxx entry:
– RefCount: 0
– State: 0 (was 0x00008000)
* Restart computer