So my computer is prone to freezing/hanging for a reason i haven't yet figured out...so because of this i always save excessively in hammer. The problem is, if my computer hangs while hammer is open, then i reset my computer to find the .vmf is completely cleared. I have autosaves on and .bsp's i could decompile to get my map back, but is there any surefire way to make sure this doesn't happen? Or what causes it?