Champion randomly becomes unresponsive

At random moments my champion will stop responding to right clicks, unable to use abilities, spells, or items. It began happening a few days ago and Ive found old posts but none has a solution. Please help, I really want to be able to play league again. http://forum.lol.garena.com/showthread.php?14973-BUG-Unresponsive-champion http://boards.na.leagueoflegends.com/en/c/bug-report/11LaMvFM-champion-completely-unresponsive