The CapsUnLock page begins with:
CapsUnlock supersedes the locking mechanism of the CapsLock key and thus prevents the accidental turning on of CapsLock. It runs as a little tray application in the taskbar. The user can select an override option, which allows CapsLock to be switched on and off by holding down the left Shift key while pressing CapsLock. Furthermore CapsUnlock also disables the Insert key.