shut it down.
then press ALT+F10 an press the power button, this will start the Acer erecovery and re-install OS from factory.
by the way the first time you boot your Switch10, you will never asked for a password.
at password request, have you tried to press just enter?
try again with ALT+F10, if it's not working, call your seller and tell him about the password and reset error.
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