Strange sort of "slow down"

Yo! I don't know what's wrong exactly with my friends comp (recently started it up again after being shut down for ½ a year).

You see, when I try to surf on the net and scroll down the screen quickly it sort of has to come a line to update it or something.
Or when I'm trying to watch let's say anime, if I enlarge the image or if the image is simply "too large" to begin with the picture kind of 'chops' and falls behind the sound, you know the picture kind of "skips".

This happens when something updates "quickly" on the computer screen.
The computer has no other noticable "slow downs", it's pretty quick.

Any idea what the problem might be? I've already done teh spyware and all that lot standard checks without any detections, so it's something else.

how much ram do you have? if you have something like 48MB or 64MB, this is to be expected.

if not that, off the top of my head, it's probably these two things:

- hard drive needs defrag
- swap file too small or set for dynamic resize

so, do this

- defrag your hard drive
- wouldn't hurt to clean your temp dirs and stuff
- (i'm assuming winxp here) start->control panel->system->advanced->performance->advanced->virtual memory->change->go to any drive that has a page file on it, set both numbers to the same (the higher number) click ok, and reboot.

also, give us your task manager output so we can see what you have running.

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