It would have been nice if they would have told you the cure also.
Anyway, http://www.tomshardware.co.uk/faq/id-2871133/reset-refresh-windows.html tells how to do it. If you you don't have the right bootable medium ask Asus tech support what best to use: the standard one you can download from Microsoft, or one of their own.
My Asus X453S has a corrupted OS. Well that's what tech support told me. When I turn it on it just goes to the start up display of asus then back to black screen. How to fix this? Or can I reset it?