If Outlook stopped working after your PC was replaced and you’re seeing an error in the desktop client (not the browser version), the issue may stem from connectivity, configuration, or profile corruption.

🧪 Initial Troubleshooting Checklist

A. Check Your Internet Connection

• Ensure your device is connected to a stable network.
• Try accessing other Office 365 services (e.g., Outlook Web App) to confirm connectivity.

B. Verify Outlook Profile Setup

• Open Control Panel > Mail > Show Profiles
• Ensure the correct profile is selected and properly configured
• Consider creating a new profile to test if the issue persists

C. Run Outlook in Safe Mode

• Press Windows + R, type outlook.exe /safe, and press Enter
• If Outlook opens successfully, the issue may be related to add-ins

D. Repair Office Installation

• Go to Settings > Apps > Installed Apps
• Select Microsoft Office, click Modify, and choose Quick Repair

E. Clear Cached Credentials

• Open Credential Manager
• Remove any stored credentials related to Outlook or Office 365
• Restart Outlook and sign in again

If the error message remains unreadable or persists after these steps, consider capturing a clearer screenshot and escalating to your IT support team for deeper diagnostics.