How to remove the Domain Controller forcely?
1. Run “Dcpromo /foreceremoval”
2. It will pop up the warning windows. Just Click “Yes” to proceed.
3. On the Welcoming Installation wizard of Active Directory, just click “Next”
4. On a Force Removal of Active Directory, click Next
5. Type the administrator password. Then click Next
6. On the next wizard, click Next for continuing the removal of Active Directory.
7. After that, the removing the Active Directory is processing
8. The Complete wizard will appeared after the completion.