Starcraft 2 crashing on PC can be caused by outdated video card driver, conflicting apps and corrupt game files etc. Try these if SC 2 crashes randomly.
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SOLVED] Starcraft 2 Crashing on PC - Driver Easy
StarCraft II Crashing to Desktop Issue Quick and Easy Fix
StarCraft II Crashing to Desktop Issue Quick and Easy Fix
SOLVED] Starcraft 2 Crashing on PC - Driver Easy
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Comunidad de Steam :: Guía :: Run Games from Battlenet Launcher