You could just slap it in.
Use a USB stick or a DVD to install windows 8
If uefi is really that important to you... It's not Like ASUS has used a revolutionary UEFI
(psssst! It's UEFI but it has the same design as a BIOS so.... It's not anything amazing...)
You could follow a guide on the interwebz on how to create a GPT UEFI or just good ol' MBR BIOS. For windows 8
Or simply use the program - Rufus, a USB bootable disk creator few clicks and you're done.
Get the Windows 8 iso from a Microsoft website. Don't remember the link and just use Microsoft's own USB bootable disk creator
If you haven't formatted or done anything to your new laptop.
Get ASUS backtracker. Have a 16 gb+ USB stick ready. Let the Think do It's thing...
Remove the old drive. Insert your old drive (have it preformatted or not... I don't know how backtracker works when installing it)
Done your laptop is back on factory settings
😉
rig: Impact VII / 4790K / Crucial Ballistix SP 16GB 1600Mhz/ 256GB 850 Pro
Corsair AX760 / H105 AIO Watercooling / Bitfenix Prodigy
laptop: G75VW 3630QM / 670m /16GB RAM / 256GB 840 Pro + 750gb/ BD drive
Gaming OC for 670m 750/1750