Think you could help me out? Same issue as the original poster here except my game freezes in game after a few seconds and i have to ctrl-alt-delete and end program i am using an alienware m15x i-3 8gb memory and the nvidia GeForce GTX 260M. Have never had any problems with fallout NV on the computer and i understand fallout 3 wasnt meant for windows i have tried the disable windows 7 themes and compatability fixes and running as an administrator just want to see if you guys have a fix i havent tried. anything new would help.
If you havent tried installing outside of program files and or (X86) programfiles (if you have win7 64 bit) , do that.
You select custom instead of default at the installer.
Unless you have a steam install , then youll want to move your steam app outside of its default location. Here's a link on how to do that. https://support.steampowered.com/kb_article.php?ref=7418-YUBN-8129
The next thing youll want to try after this install is to limit your CPU to 1-4 cores , this is done by editing the ini file found with your saves.
This is the location>>> Mydocuments\Mygames\Fallout 3\Fallout.ini
Open this document up and find the line that says "bUseThreadedAI=0" and change it to "bUseThreadedAI=1"
Hit enter, and under it add this line "iNumHWThreads=2" Close and Save the document. You can select 1-4 ... 2 is just the most common.
If you get no love from those 2 fixes , come on back and post a dxdiag. Incase you dont know how , at your command prompt type "dxdiag" Youll then see an option to export the text document to a save location you pick. Open that file up and copy paste it here.
Good luck