My Windows laptop popular when shutting down in a loop.
I can't do anything, even pressing the switch for several seconds doesn't do anything.
So I couldn't reboot either.
Battery out, plug out and rest eat!
Even pressing the switch for several seconds does not help.
That has to work, otherwise either the MoBo or the NT is broken. Press and hold Power for 5 seconds. If that really doesn't work, pull out the power plug and the battery. In that case, a defective Windows installation is most likely your least problem.