[Versed]

i've found disabling any antivirus (i use avast) helps fps by about 2-4, but that ain't that noticeable
i share your pain

I turn everything off when I go to play TF2. I also have XP set so that I have max memory allocation to programs instead of background progs.

I'll try it with HT disabled and see. Maybe I should even turn of OC on my CPU.