Just tried this excellent freeware..
This software just updates your operating system applying all the required patches and latest security fixes. Well Autopatcher comes in three different versions XP/2000/2003 respectively for Windows Xp , Windows 2000 and Windows 2003.
The exciting part of Autopatcher is the registry tweaks that comes with the software. These tweaks classified as per Appearance,Functionality,Security and Speed
are a very effective attempt to boost your system.
Just choose the tweaks you want to apply (check out Module details to find the details) and click Update to perform the selected operations.For details about this software go to Autopatcher Homepage
Official Autopatcher forum is here