Dear Summoner,

Please try those step:

1. Try syncing your Windows Clock, double check the time, date and year.
2. Make sure your Windows is up to date at
3. Make sure you
4. Make sure including this EXE (default install path), C:\Riot Games\League of Legends\RADS\projects\lol_air_client\releases\0.0. 0.68\deploy\LolClient.exe and this website,
5. Check out this article in the KB,

Best regards,