Substitutes
HKCU\Keyboard Layout
Description
The Substitutes subkey stores the codes of alternative keyboard layouts that the user prefers. The system checks the user's Substitutes subkey when loading the keyboard layout, and if a substitute is specified, the corresponding layout is substituted for the default layout. The Substitutes key has no entries unless the user has selected a substitute keyboard layout.
Change method
To change the keyboard layout, double-click Keyboard in Control Panel. Click the Input Locales tab, and then click Add in the Installed input locales box.