when booting your laptop press hold F9 key button for few seconds until you get to Windows Recovery Menu
select Advanced Start Up to get to recovery menu then select Advanced Options
then you can either go with System Restore which will restore your laptop system to previous working configuration
or reset windows to factory settings
Run the system restore option first as it doesn't erase your personal data
if you have personal data you might try to rescue that data before attempting a factory reset.Reboot when restore or factory reset is finished.