you are probably going to have to use the reset switch to even get it to boot and reinstall windows, use a paperclip in the Reset 'Hole'
https
/support.lenovo.com/us/en/solutions/ht036024
A unit will not power down using either the operating system or the power switch
Press and hold the power button for a few seconds. If the computer does not respond, remove AC power, and put a straightened paper clip into the reset hole and depress the switch. The unit should power off.
A unit will not resume from standby
In this case press and hold the power button for a few seconds. If the computer still does not respond, remove AC power, and put a straightened paper clip into the reset hole on the base and depress the switch to...