task manager wont open in game

theres no way to change volumes of things in game refer to builds do fucking anything without having to deal with the game messing with my computer function i know it probably has something to do with riot being paranoid about hacking with third party programs or some being afraid of afk bs but it has me fucking lit right now.i need to open task manager in the game for multiple reasons all the time and some times it works but other times when i try itll bug out the game one example of what happened after ctrl alt delete spamming first to have a chance at lowering my music thats way too loud i try and click around when im back in the game and i cant use any of my abilities and every where i click it just does pings. Like it couldnt get fucking annoying enough that riot fucks with my computer functions but it also fucks with ingame capabilty of doing ANYTHING. What tha fuck is this bullshit if you think about it riot is messing with the core OF YOUR COMPUTER SOMEHOW TO CLICK BACK INTO THE LEAGUE CLIENT!!!! you want to not let people hack into the game which is understandable but you can hack into our computers fuck man.