Ok, so I know i'm not nearly the only person whos had a shitload of problems trying to run an RUU so this is for some of you that had the same issues as myself. I originally saw this posted on an xda forum and it worked for me so i'm passing it along. If you are trying to RUU and keep getting stuck at the "waiting for bootloader" screen and then it ultimately fails with usb connection error 171, try this. After going through said process, instead of unplugging the phone, pulling the battery, hanging your head, and saying FML, all you have to do is leave the phone as is after first failed RUU attempt then re-run it. I know it sounds rediculously simple and impossible but trust me, just run it a second time without messing with the phone or anything (still stuck at the black HTC screen) and then run the RUU installer again, IT'S THAT EASY, enjoy! Hoped this makes someone elses day, or rather, lifetime of the phone!