Search notes:

Registry: HKEY_CURRENT_USER\Control Panel\Keyboard

Some (all?) values found under HKEY_CURRENT_USER\Control Panel\Keyboard include:
InitialKeyboardIndicators
KeyboardDelay Value between 0 (short) and 3 (long)
KeyboardSpeed 31 is the fastest

See also

The corresponding control panel can be opened from the command line with 
control /name microsoft.keyboard

Index

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