RegToy is a useful program that was designed for WindowsXP , is used to Tweak WindowsXP , and some utilities like a remaner to change the filenames and a wallpaper changer. With RegToy you can optimize the performance of your computer and customize your system to suit your needs. NOTE: The original language of this program is Vietnamese, you can select English after run application. This program only includes hidden settings, so you will not see many basic settings, you can find them in control panel -> System properties, Display properties, folder options, taskbar and start menu properties.