Ok i have the steam version, i have all DLC i have verified cache and my game still crashes on launcher its only recently started doing this. my specs are windows 7 ultimate,8 gigs ram, nvidia gtx 275 OC, amd phenom 2 965 black edition. can anyone help me fix this problem?

I've been having this problem sporadically, I'm not sure how I fixed it but I would check all of your drivers for your video card and BIOS chip. The newest drivers might not necessarily work.

You can also try running the fallout.exe folding in the program folder in compatability mode (right click>properties>compatability), and as an administrator.

Hope this helps