Star wars Battlefront 2 works fine on my new computer. i did not disable anything. I just updated my computer to latest software and drivers and it works fine on it.
Windows7 works fine for me on SWBF2. I don't get much lag.... But it might be part of what MT said. SWBF2 was designed for WinXP... it might be such a new computer that SWBF is gasp... Outdated for it!!