It was rooted (not sure which rom), the recovery does say unlocked and tampered. I can boot into TWRP recovery. It says no OS. I have SDK Manager and correct updates, USB driver installed, HTC Sync Manager installed. Also have Stock rom for HTC One.
I have tried to use TWRP to load a stock rom using ADB, I can not in any way get it to read the device. On the phone I go into TWRP - > Advanced - ADB Sideload -> Swiped to sideload and it says Starting ADB Sideload feature... then nothing ( I assume that's all it says), I then go into command prompt and go to the proper directory and type ADB Devices (it says List of devices attached and nothing ), I still try to load rom and it says no devices attached.
Now I am completely new to rooting of android devices, I am a little tech savvy tho. But some detailed instructions would help and be most appreciated. Basically I just need help getting PC to read the HTC One, thanks!