relax, it's not supposed to be the holy grail...
i found these two usefull, however...
Tip 6: Force unresponsive applications to close at shutdown.
When it comes to balky PCs, few things annoy us more than the moment when we try to shut down Windows and it tells us it can't because some crashed application isn't responding, and that we have to do it ourselves by clicking the End Now button.
This registry hack changes that. Here's how it works.
1. Launch RegEdit (select Start > Run, type regedit and click OK) and browse to HKEY_USERS\.DEFAULT\Control Panel\Desktop
2. Find the string called AutoEndTasks. Right-click it, select Modify from the pop-up menu, and change the data value from 0 to 1. (If you can't find this string, create it by selecting Edit > New > String Value and set the data value to 1.)
3. Close RegEdit and reboot.
Tip 5: Automatically optimize your hard drive.
One of the keys to system performance is an optimized hard drive. Typically, you optimize your hard drive using Windows' Defrag utility. But there's a great registry hack that will force Win XP to automatically optimize the location of files when your PC is idle. Here's how it works.
1. Open RegEdit and browse to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
2. Find the string called EnableAutoLayout, and change its data value to 1. (If this string doesn't exist, create it and set the value to 1.)
3. Exit RegEdit and reboot your PC. Done!