So about a month ago I tried to flash a rom onto my galaxy s4. I waited for about three hours and nothing happened so I did home+down+on and clicked no so it would boot back up. I want to reset my galaxy but when I go home+up+on it puts me into downloading mode and it won't let me reset my device and wipe my data. I tried using Odin on my computer but I kept getting error messages. Please help, I'd really like to unroot my device and have it to factory settings again. Thank you