Skús toto:

1. Click on Start > Programs > Accessories, and right-click on Command Prompt.
2. Choose Run As and select an Administrator account.
3. At the command prompt, type net stop cryptsvc and wait for the service to stop.
4. Type CD\ and press Enter.
5. Type CD windows\system32 and press Enter.
6. Type ren catroot2 catroot3 and press Enter.