la extencion de archivo BDV, es BitDefender Vault, son archivos cifrados o encriptados, usados por antivirus por ejemplo, y si tu computadora no lo puede abrir es por seguridad,
no se si lo vas a poder abrir, posiblemente el BitDefender de windows lo reconozca, pero no si si lo abre
Programs that can open the BDV file
Windows BitDefenderBitDefender
Why can’t I open the BDV file?
However, problems with the BDV files can also have a different background. Sometimes even the software, installed on your computer, that supports the BDV files does not solve the problem. The reason for the fact that the BDV file can’t be opened and used can also be:
- an incorrect link to the BDV file in the registry entries
- corruption of a BDV file, that you want to open
- infection of a BDV file (viruses)
- insufficient computer hardware resources
- drivers out of date
- accidental deletion of the BDV file from the Windows registry
- incomplete installation of the program that supports a BDV file?
Solving these problems should allow the free opening and working with the BDV files. If the computer still has problems with the files, use the services of an expert who will diagnose a specific cause.
My computer does not show file extensions, what should I do?
In the standard Windows settings, a computer user cannot see the BDV file extension. However, you can successfully change this in the settings. Just go to "Control Panel" and select "Appearance and Personalization". Then, go to the "Folder Options" and open the "View" tab. On the "View" tab, you will find "Hide extensions for known file types" – you should mark this option and confirm by pressing "OK". At this point, the extension of all files, including the BDV files should be displayed after the file name.
fuente:
http://www.fileextensions.info/file-extension/bdv