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.
I Just found this thread, it fixed all my problems hope it helps