Originally posted by drewhiggins:[..]
Can you if you haven't already formatted right-click on the start menu and go Task Manager and under Processes, see if there's a huge amount (in Memory Usage) that's popped up? Quite possibly it's something like a virus scanner or something resource-hungry doing it.
I know iTunes can take up to 250MB minimum on W7 and Vista but I don't think so on XP it gets like that and Firefox if you're using it can go to 700MB minimum after running a few web pages and flash videos on sites. Just have a look 'cos that could be half the problem - I know it was for me.
Also go to Start > Run and type msconfig, under Start Up Items or something similar see what's in the list - don't untick anything - but just list back here what they are and maybe that could be another issue. Just trying to think of things I'd be checking for problems and memory leaks and whatever.
Yeh mate I'll try that later

Edit: Ok there isn't any Task Manager when I right click the start menu? And the list when I ran msconfig is really long and full of random things like "smax4pnp" and "ISUSPM"?