Long story short usually first thing I do is root and rom my phones, but I recently got an HTC One off of swappa and loved it, didnt see a reason to root. I figured I would give dual-booting via multiboot a shot, so I HTC Dev unlocked it, rooted it, installed elemental kernel, and flashed CM11. Well CM11 wouldnt boot and I tinkered so I just figured I would cut my losses, so I followed the instructions to remove it which wiped my SD card. I was on linux, and couldn't get fastboot usb, just fastboot ac. So I hopped on a friends computer, Win8.1 and downloaded a special set of drivers and whatnot, got ADB and fastboot running. TWRP wasnt working very well, it wouldnt let me use ADB so I fastboot installed CWM. I managed to push cyanogenmod to it, but kept getting an error that wouldnt let me install it. So I figured next thing to do would be RUU it, and I got my version number and matched the CID and all that, it failed with an error 12. Both .exe and .zip give me the same error. Well not its 3am and I've been at it for 5 hours now, I dont know what to do. It seems like everything I try to do fails. Please give me some advice.
RELOCKED
M7_UL PVT SHIP S-ON RH
HBOOT-1.57.000
RADIO-4T.27.3218.14
OS-
eMMC-boot 2048MB
RELOCKED
M7_UL PVT SHIP S-ON RH
HBOOT-1.57.000
RADIO-4T.27.3218.14
OS-
eMMC-boot 2048MB
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