Starting a full repair, but..Client Issues

So since the release of the new runes my client has had a large list of bugs, i'm currently doing a full repair, and hopefuly that fixes some issues, but if not, I think I will just post some of the issues I been having and hopefully someone can solve the puzzle.

1-Multiple game clients starting off one click A: I click once, I start a game, and multiple screens would appear, and they would all interfere with eachother, never had more than three, failed to take screenshots of this glitch but this one wa spretty annoying

2-Black screening, possible Resolution glitch. Screen just pops black, i hear the game, i can click buttons, but the entire screen is just black. Got screens of this if riot requests them

3-Game only appears at the bottom right of the screen Literally as the title says, the game shrinks and appears at the bottom right of the screen, the bug is involved with borderless mode and is fixed when you switch it to Full screen, normally all I had to do was close the game and turn it back on again, the good oal on and off again technique. But one time I tried doing that 15 different times to have a 100 percent ratio of theglitch accuring, I had to literally go to google to find a solution, just to temporarly solve it.

Currently I won't be playing any more games until I fix this, I thought i solved it after game one, just for it to happen again in game two, so instead of being an asshole and taking a risk and sabataging my teamates, i'm just going to try to repair it, and not play till it is repaired. Maybe it's something my computer is doing wrong so ill investigate my part, but for the most part I believe riot is most likely to blame for these glitches.

That being said, sorry to whoever was on my team the past 2 games

1 last thing, my team was unable to get a remake in both these games even though I never connected in either. So Remake seems to be glitchy when said glitchces occur.