Hey guys i love fallout 3 and nv XD played a long time since it was released soo now Fallout NV is installed and i thought lets play fallout 3 so i installed it with all dlc′s and updates but if i want to play it it laggs all the time ob the video at the start and ingame ... i played it long time ago on same pc and no laggs or anything but since i installed new vegas it lagg ......

can anyone help me is there a prob i run the games on vista have normally no probs with new vegas or whatever :cryvaultboy:
sorry for my bad english XD hope you guys understand it

Any chance you could run it on another computer?

It seems strange that they would conflict with each other. You might have to un-install New Vegas.