The patcher? I've had the same problem, the patcher wil open if you delete the lol_launcher folder. mine is located in C:\Riot Games\League of Legends\RADS\projects but I dont know where you put your folder. You might also have a problem with the PVP.net not opening so you can login too. I fixed that by deleting everything but the "assets" folder in lol_air_client located in the same place as the lol_launcher. I chose not to delete assets because the size of the folder was larger than every other file and folder in lol_air_client put together. and it worked fine. but then I ran into a problem where I cant get to the loading screen after champion select and the reconnect button does diddly squat, tell me if you get it working.