Vista is the OS. There is a backup program with Vista but that is not Vista. If you say it's a backup file let's try this common issue and cure -> Read http://forums.techarena.in/windows-xp-support/22176.htm#post1864045
I usually find this message after people have tinkered with the system a bit. That registry edit usually knocks it back to how it came.
Vista stored all of my backup files in the recovery drive. Now the recovery drive is full. Is there any way I could delete the existing backup files in the recovery drive?