Hey everyone, I just recently purchased windows 7 ultimate 64bit, and i have ran into this problem for quite some time. When downloading things or streaming videos, my computer becomes very slow and choppy even though my cpu usage is low. I usually notice this problem when my pc has been on for over 12 hours, but i've never noticed this problem when i had xp. Theirs no way it can be a virus because I have reformatted 3 times, and nothing has changed. My systems specs are: Intel Core 2 Quad Q6700 @ 2.66GHZ nForce 750i SLI motherboard 6gb ddr2 ram ATi Radeon HD 4800 Series I'm not sure what else would be helpful besides these specs. Everything seems to be updated. What can be the problem? Please help someone!