I have downclocked cpu to 3Ghz 4 cores using XTU as the laptops cooling system can't handle the cpu at rated speed.This is not good enough coming from Asus, screen (IPS) are fine so I'm keeping the laptop.

Tried to boot a usb3 stick with windows 10 preview, a no go. Tried a bootable cd, no go.What's a poor chap to do if want to install a fresh copy of windows?Tried disable secure boot in bios, tried create new boot device in bios, no go.I'm stupid, but...