Turn on automatic updates.Check device manger that there are no yellow symbols in there as they will need drivers if there are any items in there.
As I said give it a defrag,clean out temp files do a disk cleanup via sytem tools.
Update MSN/Yahoo messangers if they have not already been done.
And I will move thread to xp and change its name to XP updating and cleaning.If thats ok?
No need for more
RAM its looks like she has her max fitted.