HTC One (whats worse than a noob?)

Hi,

I just picked up an HTC One from a friend, it was lying around his place, he does not know whats wrong with it and I thought that I would try to look into to it.

It does not go past the HTC "Quietly Brilliant" start up screen, when I hold the Power+Volume buttons and go into the boot loader and try to restore the device (mind you I have no idea what I am doing, just following basic instincts I guess) and it says no OS installed, I've wiped the phone clean, there is nothing in it, the phone is in a boot loop, and I have no idea how to fix it.

any help would be appreciated!.