Hello, I have a HP Pavilion 551W with 1.6 gHz Intel, 1.536 Gig of ram, 7200 rpm hard drive. I just formatted the hard drive, reloaded XP Pro, only installed MS office, Comcast supplied anti-virus which is "Constant Guard" and Norton. The PC seems real sluggish for all that it has in it. Sometimes when you type, the letters in email don't show on the screen right away. Pages on the internet seem to load very slowly and I have cable broadband. Is there a way I can isolate what might be dragging this down?