Client Window size and more

After every game, League's client pops back up and gets very glitchy... takes forever to load...(waiting for stats) and resets my window size back to 1080p. i play on a 4k monitor so its kind of annoying seeing a small client all the time... especially after i repeatedly set it back to 1440p.. More bugs i have had lately:

• not all buttons show up on the league client -league clients window size gets distorted.. ie: cant see the find match button or the top row of buttons..(next time this stuff happens ill take a screen shot) -black screen after game start. Game took quite a while to show up on my fullscreen. i could hear the game start up but windows would not focus on the window.. finally fixed this by making it run in admin, and compatibility mode (win7). -in-game will randomly go out of window with a little windows 'ding' and just stay in non responisve mode.. have to go into task manager to quit and restart game.

This is a fresh copy of windows, only thing on it is avast and google chrome. ive played 3 games ranked and lost a lot of lp cause of remake. got a queue ban for it. Not looking for any pity, just hopefully a fix for me and anyone else experiencing these problems.

ps: Win10 prem, gtx780 i7 3820...