Recently I've installed another game on my computer, and since then, LoL won't open properly. When I click the shortcut, the launcher opens without any problems, but after I click play, nothing happens. I get no error or login screen whatsoever. If I click play, and quickly look at my task manager, it says under processes: LoLclient.exe and under description: Adobe air debug launcher. This process closes after a few seconds.
I have tried everything I thought would work, uninstalling and reinstalling LoL, repairing LoL, Reinstalling directx, reinstalling Adobe AIR.
If anyone can help, please, I don't know what to do anymore.
I've found a solution! Try to uninstall LoL, and afterwards, check if your Riot Games folder is still there. if it is, some folders are broken. to fix this, reinstall LoL, but install it to another location (you can do this in the setup.). It should work after this.