Client closes and fails to launch games

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The High Council



This happens sporadically but it has happened two games in a row now and i'm quite flustered. After champion select, instead of the match launching i get a message that reads " The program can't start because MSVCP80.dll is missing from your computer. Try reinstalling the program to fix this problem." Any help on what this is? so far the only way i am able to get into game is by restarting my pc but it has failed the past two times.

Posted this yesterday. still having the same issue. Can't play a game without this message popping up and its getting on my nerves now. why all of a is LoL failing?