Randomly alt tabing during match

league of legends how to fix the game client from randomly tabbing out during a match
SKIP TO 35 SECONDS TO SKIP ME TALKING AND GO STRAIGHT TO THE FIX THANKS this proplem annoyed me so i decided to fix it up. i hope i helped you guys :-) leave a comment bellow if it doesnt work for you i will try fix it.
I saw another forum like this but for some people the problem is not solved because there is no office under Microsoft in control panel.
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