Nice program to tune up windows xp,its very easy to use and has simple interface.
It allows You to run varius Microsoft Console Applications,has Process/Thread Monitor, an integrated taskbar, Registry analyzer and cleaner and some easy to use Administrator options like controlling auto logon feature, option to add/remove entries in control panel and bunch others.
More info:
hxxp://www.xptuneup.com/xptuneup_downloads.htm