I had something strange....
i wanted to hide the mouse cursor: so i used display cursor off
reg csave
reg save
rebooted.... mouse pointer was gone
but so was the touch screen....
no touch anymore
wanted to switch on display cursor on
save
switch on/off
all off a sudden no screen anymore.... black.
switch off/on
still remains black.
examine...;
all my custom registry changes are gone !!
i can start all over again... !!