I've seen alot of people having issues with dual core processors and i have the same issue except its a triple core processor what do i need to do to fix it because the fix said "this enable dual cores" WHAT ABOUT A TRIPLE CORE also when looking for that file i was unable to find it i went through document to my games fallout 3 and now ive looked through the notepad (i assume thats where it is this looks like the code lines) but can't find it anyone know where exactly in this thing it is btw I'm using vista

and for what its worth 64 bit vista

The name of the file you're looking for is fallout.ini, and it is in your Documents\My Games\Fallout 3 folder. It should show up as File Type Configuration settings, and has an icon that looks like a document with a gear on top of it. Open this file in Notepad, and do a search for the following line (use the Find command located in the Edit menu) -

bUseThreadedAI=0

(it's located near the bottom of the first big block of code, but using the Find command will take you right to it).

Change that line to -

bUseThreadedAI=1

and then hit Enter, creating a space just below that line. Insert the following line in that space -

iNumHWThreads=2

Save the file (in Notepad, choose the Save As ... option, and then select the All Files (*.*) file type. Otherwise, Notepad saves it as a text file), and then exit.

What this change does is force Fallout 3 to run on only two of your three CPU cores - the game was written for dual cores and doesn't do well with more than two.