If you have a legit copy of XP pro, then I suggest that you wipe the drive and do the install.
A lot of these custom packages that you get when you buy the unit are full of crap. Dell is a good example. 3/4ths of the icons, you'll never use and most of the "goodie crap" needs an upgrade or a credit card to keep it up to date.
The other issue you might want to look at is spyware. Top left hand corner of this web page has links to Spybot and Ad-aware. You could have a problem here, especially if you have kids that like to get on the internet
