League of Legends and Valorant developers Riot Games have added an optional “on demand” mode to their Vanguard anti-cheat software. With this new mode enabled, Vanguard will only run when you fire up a game it needs to be active for, duly shutting down once you exit said game. Up until now, the only option has been the default one: having Vanguard start up the moment you turn your PC on, then run in the background until you shut down.…