Here are some steps to help you troubleshoot Active Directory data corruption issues:

1. Perform a full backup of Active Directory system state
2. Determine the type of corruption and its location
3. Make sure to disable the antivirus
4. Check the logs for any associated errors
5. Run the appropriate Microsoft diagnostic tool
6. Check the System Volume Information folder
7. Run read-only defragmentation and consistent checks
8. Restore from backup if needed