“Trusted Mode Failed to Launch” error occurs in Counter-Strike: Global Offensive when your Beta version is outdated. The easiest way to fix it is to update beta version to latest one.

Fix 1: Update to Latest Beta Version

• Open Steam client and go to your library.
• Select Counter-Strike: Global Offensive from the left menu.
• Right-click on it and choose Properties.
• Go to “Betas” tab.
• Choose the latest available beta version (If this does not work, try previous version).
• Save the changes.
• Wait for Steam to update the game.
• Restart Steam client.
• Launch CS: GO.

That’s all. Say good bye to Trusted Mode Failed to Launch error 🙂