Two years ago I got a 2 Tbyte HD for "data" and it's less than 25% full, 2 years later, so I made a partition on it so I could install Win8.1 as an experiment. Used an ISO and Rufus. USB drive boots, but Win8.1 refuses to install to the GPT partition. Research shows there are "BIOS settings" somewhere, but everything I change renders the USB drive non-bootable. Somehow, when I first bought the 2 Tbyte drive, I got it recognized by this computer for Win7, but Win8 won't have anything to do with it. The computer is an HP but Speccy says it's "Asus". Asus P5BW-LA BASSWOOD3G It has "P5BW-LA" printed on the motherboard, so I'm sure it's this. I read about modded BIOS and SLIC, but I have no idea what that is. I wonder if "unlocked" BIOS gives me options to access this GBTpartitioned hard drive. Help?