DJ;
You should not have to.
Of course you should uninstall, not just disable, any applications
Windows XP has issues with.
Check this link, especially #3 Upgrade Advisor, to be sure your
computer is ready for Windows XP: http://www.microsoft.com/windowsxp/home/howtobuy/upgrading/default.asp
It is always a good idea to back-up important data just in case.