Menghapus AD :
1. Click Start, click Run, type cmd in the Open box, and then press ENTER
2. Type esentutl /r path\ntds.dit, and then press ENTER. path refers to the current location of the Ntds.dit file
3. Delete the database log files (.log) from the WINDOWS\Ntds folder
4. Restart the computer

Recover AD :
1. Click Start, click Run, type ntdsutil in the Open box, and then press ENTER
2. At the Ntdsutil command prompt, type files, and then press ENTER
3. At the file maintenance command prompt, type recover, and then press ENTER, type ? if need help
4. Type quit, and then press ENTER
5. Restart the computer.