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My 10GB backup (bkf) file has corrupted due to virus attack so now what can I do at this situation please suggest me easy and safe answer so that I can recover my data from backup file.

Edited by happygeek because: thread closed, has become a spam magnet
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The OP () reports a 10 GB .bkf corrupted after a virus. Immediate priorities are preservation and safety: stop using the infected machine, disconnect it from networks, and make at least two independent copies of the .bkf (and, if possible, a disk image of the source drive). Work only on copies — never the original.

Create verified copies and checksums before attempting repairs:

Windows:  copy /B "C:\path\backup.bkf" "E:\backup_copy1.bkf"
Windows:  certutil -hashfile E:\backup_copy1.bkf SHA256

Linux:    dd if=/dev/sdX of=/mnt/external/backup_image.img bs=4M conv=noerror,sync
Linux:    sha256sum /mnt/external/backup_image.img

Attempt a safe, native restore on a clean, offline Windows system that can run the NTBackup/restore utility. Always restore into a new folder (not over existing files) and scan any extracted files with up-to-date antivirus before opening executables or scripts. If the native tool reports header or catalog errors, try reputable BKF-repair utilities only on copies; prefer tools that offer a free preview so you can confirm what is recoverable before paying.

Be cautious with third-party guides and downloads. Do not run untrusted installers on an infected machine. If the data is business-critical or the BKF contains unique content, stop repeated DIY attempts (each write can reduce recoverability) and consult a professional data-recovery service. In many cases partial extraction of documents and media is possible even when full restore fails — prioritize irreplaceable file types first.

For future protection: keep multiple backup copies, store at least one copy offline or offsite, verify backups periodically with a test restore and checksum, and adopt a hybrid local+offsite strategy. This follows ’s offline-drive advice and ’s note about offsite/cloud copies; ’s pointer to third-party recovery steps is useful, but apply those steps only on verified copies and with caution.

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Member Avatar for rubberman

This is why we store backups offline. If they are connected to the computer, then corruption (accidental or deliberate) can occur. For my backups, I keep a bunch of 2TB hard drives that I can stick into an eSata docking bay, backup my stuff, unmount the drive, and take it offline. It is then inaccessible by other stuff, including malware. I do this with my system drive as well. I have been able to restore my system to a known good state that way after getting pwnd or some other catastrophic event has occurred. IE, backup system drive, backup data, take backup drive offline. Make data system and data backups on a regular basis. When you have to restore the system and data, you may lose a bit of work, but mostly you will be intact.

Member Avatar for Sandy Douglas

As far as I understood, you have kept your back up file on your computer. That's not reasonable. If you have only one copy and it is corrupted, I guess chances are few to recover the information. I've been using Acronis Back up and Recovery tool(http://www.acronis.com/en-eu/cloud/backup/) and keep my back ups in the cloud. Very convenient since I can access them any time from any place.

Member Avatar for David_40

Read this Wikihow Blog:

It help you to repair corrupted BKf file and also restore it to Windows 7 or 8.

Edited by David_40 because: add desciption
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