Try this to Repair and Extract Corrupted Windows BKF Files:
Backup is one of the safest ways to protect data from disaster situation and for this Microsoft provides free NTBackup.exe utility. By using NTbackup.exe utility you can protect your entire database like: Software, documents, images, video, mp3 as well as you can back up your Outlook and SQL Server database. As you already know that backup helps us at that time when we suffer from corruption problem because this time it gives you the entire database as it is as before. But if you found that you have not valid backup then what will you do. Backup files can be corrupted due to numerous logical corruption reasons like: CRC error, hardware error, Virus or Trojan attacks etc.
Due to above stated reasons if your backup file got inaccessible and you try to access lost database in order to restore BKF files then maybe you can see the following error message:
The backup file is unusable. You must erase it, or choose another file."
This error message pops up every time when you try to restore invalid backup file. So, no need to try more than one time because only third-party backup recovery tool helps you to restore corrupted BKF database.
BKF Repair tool which is also known as D Drive BKF Recovery software contains powerful and easy to use features. This is the demanded tool that supports all the error messages that interrupt you to extract backup database. It makes you able to restore corrupted BKF items easily.