You need to reinstall new windows on your laptop. Beacuse your boot is got corrupted.
You can download windows 10 x64 bit opertaing system image file from microsoft.com after that
Download 'power iso' and create a bootable usb drive. (You can google that how to create bootable drive with power iso)
Now turn your laptop off and insert this bootable drive in it.
And turn your laptop on. After quickly mash f12 and select your usb drive. Your windows installation will be started soon.
(Or you can google and find '" how to install windows on asus laptop with bootable usb drive.