I usually play the game without using FOMM to launch it and New Vegas doesnt have any mods attached to it. The only two mods Im running are the unofficial patch and an object placement fix patch. Unofficial Fallout 3 Patch.esm Zeta.esm PointLookout.esm ThePitt.esm Anchorage.esm BrokenSteel.esm Fallout3.esm Unofficial Fallout 3 Patch - Operation Anchorage.esp Unofficial Fallout 3 Patch - The Pitt.esp Unofficial Fallout 3 Patch - Broken Steel.esp Unofficial Fallout 3 Patch - Point Lookout.esp Unofficial Fallout 3 Patch - Mothership Zeta.esp ObjectPlacementFix.esp Total active plugins: 13 Total plugins: 13 Heres one from New Vegas launcher, same code Faulting application name: FalloutNVLauncher.exe, version: 1.2.14.0, time stamp: 0x4d5f0be3 Faulting module name: GameOverlayRenderer.dll, version: 1.4.54.93, time stamp: 0x4d669662 Exception code: 0xc0000005 Fault offset: 0x00012d03 Faulting process id: 0xaf8 Faulting application start time: 0x01cbd6d939d362cd Faulting application path: e:\steam\steamapps\common\fallout new vegas\FalloutNVLauncher.exe Faulting module path: E:\Steam\GameOverlayRenderer.dll Report Id: 78ffec35-42cc-11e0-a902-005056c00008 An earlier crash of Fallout 3 Goty Faulting application name: Fallout3.exe, version: 1.7.0.3, time stamp: 0x4a40f18b Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000 Exception code: 0xc0000005 Fault offset: 0x3eccccce Faulting process id: 0x11f4 Faulting application start time: 0x01cbd6c103c9456a Faulting application path: E:\Steam\steamapps\common\fallout 3 goty\Fallout3.exe Faulting module path: unknown Report Id: e657b3ff-42b7-11e0-a902-005056c00008 All I know is when the game saves, loads, or during in the middle of an animation it will crash. Sometimes I cant even leave rivet city once I make a save there. In fallout new vegas It will crash for the same reasons.