Maybe corrupt but usually it will not start the service if so. Here is a way to fix a corrupt active directory: http://support.microsoft.com/kb/258062
Otherwise I am not sure what is going on there hopefully you backed up your Active directory so you can restore it.
Last Wiki Answer Submitted: November 3, 2010 1:08 pm by FrankTheTank1,200 pts.
All Answer Wiki Contributors: FrankTheTank1,200 pts.
If you live outside the United States, by submitting your email address you consent to having your personal data transferred to and processed in the United States.