League of Legends Patch not working, Please report to me as soon as you can[CLIENT]

For some I can't get into my LoL game. on my computer it says "PVP.net Patcher has stopped working" its been like this for a while now. What's going on? I've tried to remove the files from my computer, and re-downloading the actual program again to see if it could help. I've tried accessing the same files over and over again to see if at all i could get into the game. I even have a friend of mine that's having the same exact issue as me, and we're both are confused on what to do. Please respond back as soon as you can. i'd like to know whats going on, and if you can fix our problem.