You had a break-in last night. Or maybe a car sideswiped your parked vehicle in the driveway. Or a package was stolen from your porch. You go to check your security camera system for the footage — and it's not there. The recording is missing. Or it's there but won't play. Or it plays for two seconds then freezes. Few things are more infuriating. You bought a dvr camera system or NVR specifically so you'd have evidence when something happened. Now the one time you actually need it, the footage is gone. I've seen this happen...