Method 1: Reset Permissions Manually. Right click on the blocked drive or the folder and then click on the " Properties " option. Navigate to the " Security " tab and click on it as well. From under " Group or Usernames " choose Administrators, should be Your-UserorPC-Name\Administrators. Select " Edit ". Once more, select the. Leave a Comment on Error: Access denied to the harddrive and the security tab missing under properties When your drives, external hard disks, and USB flash drives are infected or suffer from a power failure etc.