How to fix the Steam.exe (Main Exception) error: Windows

This short article will explain what to do if you are facing the Steam.Exe (Main Exception) to Run Steam error.

To fix the Steam.Exe (Main Exception) error:

• Make sure you are connected to the internet.
• Try to create an exception for Steam.exe on your firewall and/or antivirus.
• Delete the ClientRegistry.blob file located C:\Program Files (x86)\Steam.
• Temporarily disable the Windows firewall or/and your antivirus preventing any Steam updates.
• Once done, launch Steam.