Is my GPU burned out from running Battlefield 2?

I bought a new laptop, Acer Aspire 5102WLmi
- AMD Turion 64 x2 Mobile Technology
- 2 gigs RAM
- Radeon Xpress 1100 128mb
- Windows XP Media Center

I could run Battlefield 2 smoothly on low settings until recently, where it would become so choppy that the game is unplayable. Here's what I tried so far:

- Set everything to low or off.
- Reinstalling the game
- Prioritize my IRQ(on one of the tweak guides I read)
- Rename it to BF1.exe(again, tweak guide)
- Set Punkbuster checks to 500 seconds
- End every process that has my username on it except explorer.exe
- Delete my shader optimization folder and optimized it again
- Downloaded the AMD dual core optimizer and updated drivers
- Went into the Catalyst Control Center and set every setting to the lowest possible
- Defragged my hardrive
- Run spyware/adware/virus scans
- Uninstalled AVG because it was running in the background
- Uninstalled some unnessecary programs
- Researched overclocking, but found that I shouldn't overclock integrated graphics
- Tried to update video card drivers, but Catalyst 6.12 gave me an incompatibility error
- Tried to increase AGP size aperture, but didn't find the option to in my BIOS

I asked on Battlefield 2 forums and the responses I got was that it was a heating problem, and that my GPU isn't fit to run it and i've killed my computer, so I ran the air conditioning and bought a cooling pad and it isn't hot at all while running BF2, so that probably isn't the problem. When I play other games however, games that aren't graphic intensive at all such as old RTS's, I get choppy gameplay, so i'm beginning to wonder if I really did kill my computer. What can I do?