Client Fails to Launch after clicking "Launch" [Client}

Hi there, I have been encountering an issue for the past few days which is terribly frustrating. I was getting the "Bex" error at first, which I solved by removing my AVG antivirus software, which isn't truly a fix and it blows having paid money for protection software and having to remove it to play your game. If you have a fix for that I would appreciate knowing so that I can get my protection suite running again that I paid for a 2 year subscription. That is a separate issue from the one I come to you now with however.

Currently, when I click "Launch" on your client in the login screen it shows it is loading via the mouse icon changing, I have the processes running when I open task manager. Yet, nothing happens. If I click to load the launcher again, it tells me another is running and asks if I want to close it, so the software recognizes the fact it's already open. It just doesn't progress from the login to the next phase, and hangs between the two until I kill the program is task manager.

I have no clue what is causing this. I have done the following:

1: Reboot system. (Failed) 2: Close steam in the event of an interaction. (Failed) 3: Repair client. (Failed) 4: Uninstall and reinstall. (Failed) 5: Go into Riot Games>League of Legends > RADS>Projects>Lol_air_client_Releases>0.0.1.230 and deleted "Releases" and "S_M" as I found this was a fix for some. (Failed) 6: Went into Riot Games>" ">Projects and deleted every folder but "lol_air_client_config>na" as was suggested elsewhere on this board. (Failed)

It's just suddenly started to do this after I updated Windows, and uninstalled AVG. Previously, I was encountering the "Bex" error, which prompted me to check my drives (all good), update windows, and uninstall AVG which the last finally rid me of the Bex error. However, I did have it earlier today, randomly for no conceivable reason, which prompted the uninstall and reinstall in order to get to be able to play for several hours on my Aram specific account, not this one. Once I closed league, and then tried to open it later, this fun issue started.

I'm running Win7 Pro 64 on an Intel I7 5820k (3.30 GHZ) processor if that matters. I've been running League since Season 2 on 4 different machines, normally I can solve these issues myself, but ugh. Having spent nearly $300 across two accounts on this game, I'd like some help.

Edit: It should be noted these issues started the end of last week after your latest patch at the time. I patched Thursday or Friday evening, and since then Bex and this issue. I forgot that, that might be major.