Windows XP Disable Prefetch

Prefetch is designed to speed up program launching by preloading programs into memory - not a good idea is memory is in short supply, as it can make programs hang. To disable prefetch:
1. Click 'Start' then 'Run'
2. Type in 'Regedit' then click 'Ok'
3. Navigate to 'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters\'
4. Right-click on "EnablePrefetcher" and set the value to '0'
5. Reboot.

Note : These tips may not necessarily speed up your system. But most of the times they work perfectly. Use them carefully.