Improve The Overall Performance

1) Open Registry Editor.
2) Open the submenus:
[HKEY_LOCAL_MACHINE]-->[SOFTWARE]-->[Microsoft]-->[Windows]-->[CurrentVersion]-->[Explorer].
3) Find string value [AlwaysUnloadDLL] and double click it. Then modify the default value 1 to 0. If the string value does not exist, right click [Explorer] and select New, then select String Value. You will see a new item on the right window, then name it as [AlwaysUnloadDLL] and set the value as 0.
0 means useless dll files are disabled.

Then restart your computer. After you do this will make the Windows XP startup faster by several seconds and run quicker. But there are thousands of registry keys in the windows XP. To improve the overall performance, you need to optimize the whole registry. You need to use a registry optimizer to help you to tweak your PC.