Ok so today i figured out. What seemed to cause mine was I had done a system restore on Windows and apparently that messes up LoL. SO follo these steps to fix:

1. Uninstall LoL, Pando Media Booster, and Adobe Air.
2. Restart your computer
3. Install LoL and Adobe Air
4. Delete everything in the C:\Riot Games\League of Legends\RADS\downloads folder
5. Delete lol_air_client and lol_air_client_config_na inside C:\Riot Games\League of Legends\RADS\projects
6. Restart your computer
7. Run LoL in Administrative mode

make sure to bump this to help all those whose LoL launchers arent working

Anyone tried it yet?

trying it now :T

doesthis work?

It worked for me. But if your Launcher wont work i would definately try this!

okay so i have gotten to the point where i can log in, but now it wont let me play. After champ selcet i get an error trying to laod any help would be appreciated.

Bump! People need to see this!

Come on guys bump this lol and glad it worked

Didnt work =/

how do i find the C:\Riot Games\League of Legends\RADS\downloads folder