i just purchased this on steam and every time i try and start a new game it crashes and i get this error.
can anyone tell me what it means?

im trying to run it on a MacBook Pro 13" (late 2011) with the Intel Core i7 2.8 GHz with 4GB ram and using the Intel HD 3000 for graphics. I keep seeing that not having a dedicated graphics card can cause an issue but for the game to just crash because of that seems odd because when i first launched the game it did its 'Detecting Graphics Card' thing and set it to medium by default. ive tried setting all of the graphics to low, change the processor cores being used in the fallout.ini file and putting it in windowed mode and it seemed to get a little farther before crashing but it still crashed before it got past the loading screen. If it really is a graphics card issue i guess i can wait till i can get my hands on my gaming pc again (just moved and its a bit to heavy to bring on a plane, will be moving it out here next summer) but itd be nice if during the detecting graphics it just knew it wasnt going to work and told me. seems like something like that could be implemented.

Problem signature:
Problem Event Name: APPCRASH
Application Name: Fallout3.exe
Application Version: 1.7.0.3
Application Timestamp: 4a40f18b
Fault Module Name: Fallout3.exe
Fault Module Version: 1.7.0.3
Fault Module Timestamp: 4a40f18b
Exception Code: c0000005
Exception Offset: 006ddf7b
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

if you are using mods, please check two programs, BOSS and FOMM. typing that into google will get you straightened out. mods are the number one reason for crashes on startup.