Hi, I have an older dell dimension 4550 with xp, pentium 4 2.66, 1gb of ram, 150 gb hard drive. Has always run great but lately i've noticed a bit of a slow when when programs run. also have noticed certain times cpu usage goes up to 100% when i run a program or load a new web page etc. is this normal? it seems things take a little longer ever since service distribution 3.0 was installed by windows a couple weeks ago on here. i'm probably going to be upgrading to a new machine before too much longer but i really think i can get this one running a bit smoother for now with some of your help...thanks