There can be several reasons why the user is not able to delete a file on the NTFS Volume or disk partition of the computer. Possible scenarios are as follows.
1. The user does not have sufficient permission to perform the task as the file itself may not be owned with the user. The best way is to make sure the user is an administrator.
2. The file is corrupted which prevents to properly access, running a chkdsk will help to validate with this.
3. Another common scenario is that the file is actually currently in use.