Some services are critical to Windows XP’s operations, so make sure you understand what the service is before you disable it.To reduce the number of services that start on bootup, you can access two different areas of Windows XP.

Restart your Windows and enjoy better Game performance Disable Services XP Pro runs a lot of services by default that are pointless if your not on a corporate network, the following services are ones that I safely disable thereby freeing up memory but check what each one does first to make sure your not using it for something: Go to Run and type services.msc, right click on each service, properties and choose disable.