Steam won’t open

Try these steps in order. Stop if a step does not apply to your device or could risk important data.

1. Fully exit Steam in Task Manager.
2. Restart the PC.
3. Right-click Steam and choose Run as administrator.
4. Temporarily disable overlays or third-party security tools for testing.
5. Reinstall Steam without deleting the steamapps folder if necessary.

Back up important files before repairs that may affect storage or system settings.