Can you be more specific? Where did it come from?
It may be a McAfee Quarantined File, which opens with
McAfee Total Protection
McAfee Internet Security
McAfee Antivirus Plus
It mat be a DVD IFO Backup File
this opens with
CyberLink PowerDVD 17
Corel WinDVD Pro 12
Apple DVD Studio Pro
Roxio Toast 18
It may also be a backup file which opens with the software that created it.