I accidentally deleted the recovery portion so I can'tell do any kind of recovery, refresh or restore, so I went ahead and bought a full version od windows 8.1 on Amazon, I didn'the send it to the manufacture (Asus, who do not have recovery disks), as it would be over $50 to send and then I would be without a computer for two or three weeks. Anyway, I put the computer to boot front the DVD player, which it did fine, it then asked me "where do you want to install windows", I have three hard drives attached to this computer, two intrenal and one external all three 2 this says that windows can'take be installed on any of them as they are GPT and windows nends NTFS. The reasons on it bought the new windows is because I got 0xc000021a blue screen and I can't get in to reformat these disks. It is now 9:25 Thursday night and I sure would like to get this in asap. Thanks In Advance!!!!! Ted