Frustrated and flustered said:
it's an Inspiron N5010,
intel core i3 cpu (m370 @ 2.40GHz, I dunno what that means)
4 gb of RAM
I'm kind of a console gamer, so I'm not well versed in this kind of stuff.
By looking at your laptop model, it seems you have an intel HD integrated graphics card. as jaguarskx mentioned, there is a way you can get it to work. You need to download a d3d9.dll to here the fallout 3 is installed (the fallout 3 directory) where your fallout 3.exe file is located.
You can find the full steps here
... hope that helps...