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Feedback submitted through this channel will be used to improve the quality of content found in the knowledge base. Click the Compatibility tab. Download this tool to quickly find and repair Windows errors. Right click it and go to Properties. Important Windows 8 Apps That Are Still Missing in the Windows Store.Nov 27, The error "Failed to start game (unknown error)" is a Steam error. To resolve this Administrator and Compatibility mode. Click Apply and OK to save the changes. Jan 29, How To Fix Counter Strike: Global Offensive Crashes And FPS Drops On