League client crashing every time I try to start it

"System error A critical error has occured and the process must be terminated. Would you like to create a crash dump to aid the developers in troubleshooting this issue? This may take up to 5 minutes. Note: the process may appear unresponsive during this time" My friend said this also happened to him yesterday, and he had to uninstall/reinstall. Hopefully you guys at Riot can get this fixed asap, Thanks.
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