If you are getting "Access is Denied" while running CMD as admin, it could be due to a permission issue. Here are some steps you can try to solve this issue:
- Right-click on the Command Prompt icon and select "Run as administrator".
- If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
- Type "net user administrator /active:yes" and press Enter.
- Log out of your current account and log in to the Administrator account.
- Open Command Prompt as Administrator and try running the command "chkntfs /x d:" again.