To fix An error occurred while starting Roblox Studio, Studio details failed to create key or deploy, Reset your Router, Reset TCP-IP, Disable proxy settings, etc.

Besides this technique, players can right-click on the Roblox app to ‘Run this program as an administrator,’ restoring its proper rights. Or, you can re-install the game when all else fails ...

If you get the Failed to create directory message with error=3 when starting Roblox on your Windows PC, use these proven fixes.