Geez, yeomanry, you remind me of my dad. He never met a utility he wouldn't run. Kill the ehome stuff, all that discgui junk, the itunes stuff, Windows Defender, and you can probably kill all of those ATI programs if you're not running custom color schemes or the like.
When you say AH2 is running slow, do you mean the frame rate is low? What resolution are you running and which AH2 textures (256, 512, or 1024)?
I have a 2.2 GHz Celeron, 1 GB RAM, and a 5700 Ultra with 256 MB. There are 20 processes running, including the browser. I get about 50+ FPS in AH2 at 1280x960 and the 512 bit textures.