File Type Generic IconWindows Registry Backup File
File Format Proprietary (Microsoft)
Usage Referenced by an application; not meant to be opened manually
Rank ★ ☆ ☆  Uncommon

Backup of the Registry database used by Windows; contains a copy of original registry files; for example, system.da0 is the backup file for system.dat.

DA0 files may be used to replace corrupt registry files. They are not meant to be opened or edited by the user.

Open With

IconShould not be opened or modified

Updated 2007