Infected Game File found in League PBE Files

I was trying to play a game with friends when suddenly my anti-virus tracked down a file infected with Gen:Variant.Graftor.548073, it has been moved to quarantine and all that stuff but am I the only one receiving/seeing this? Even after reinstalling PBE, it still detects it

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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