I have a dell demension 3000 ( i know nothing special) The original specs were a 512mb ram and a 2.8ghz p4 and i have upgraded it to 2gb of ram and a ati radeon X1550 256mb graphics card. I just reformatted from xp home to xp pro and i have noticed a sever slow down in the computer before battlefield 2 maps would load within 2 to 3 mins and ran smooth now they take close to 5 and are jitterey in the game and simple task on the computer are all jittery and slow to what could be causeing this. is it xp pro or something else. I have ran virus scan and several disk defrag waht could be wrong.