L'ordinateur ne se connecte pas à l'Internet partagé

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Encountering issues with your PC not connecting to shared internet can be frustrating. This guide will walk you through several troubleshooting steps to resolve the problem efficiently.

Check Physical Connections

Verify Ethernet Cable

Ensure that the Ethernet cable is securely plugged into both your PC and the router. Try using a different cable if you suspect the current one is faulty.

Inspect the Router

Check if the router is powered on and functioning properly. Look for any warning lights that might indicate a problem.

Network Settings

IP Configuration
  1. Open Network and Sharing Center: Right-click on the network icon in the system tray and select “Open Network and Sharing Center.”
  2. Change Adapter Settings: Click on “Change adapter settings” on the left-hand side.
  3. Check Properties: Right-click on your network connection and select “Properties.”
  4. TCP/IPv4 Settings: Highlight “Internet Protocol Version 4 (TCP/IPv4)” and click “Properties.” Ensure that “Obtain an IP address automatically” and “Obtain DNS server address automatically” are selected.

Reset Network Settings
  1. Open Command Prompt: Type “cmd” in the Windows search bar, right-click on “Command Prompt,” and select “Run as administrator.”
  2. Execute Commands: Type the following commands one by one and press Enter after each:
    • ipconfig /release
    • ipconfig /renew
    • ipconfig /flushdns
    • netsh int ip reset
    • netsh winsock reset

Wireless Connections

Check Wi-Fi Adapter
  1. Device Manager: Press Windows + X and select “Device Manager.”
  2. Network Adapters: Expand the “Network adapters” section and locate your Wi-Fi adapter.
  3. Update Driver: Right-click on the Wi-Fi adapter and select “Update driver.” Choose “Search automatically for updated driver software.”

Forget and Reconnect to Network
  1. Network & Internet Settings: Go to “Settings” > “Network & Internet.”
  2. Wi-Fi: Select “Wi-Fi” from the left menu and click on “Manage known networks.”
  3. Forget Network: Click on the network causing issues and select “Forget.”
  4. Reconnect: Try reconnecting to the network by entering the correct password.

Router Configuration

Reboot the Router
  1. Power Cycle: Unplug the router from the power source.
  2. Wait: Leave it unplugged for about 30 seconds.
  3. Reconnect: Plug the router back in and wait for it to fully restart.

Check for Firmware Updates
  1. Access Router Settings: Open a web browser and type in the router’s IP address (commonly 192.168.1.1 or 192.168.0.1).
  2. Login: Enter the username and password for the router.
  3. Update Firmware: Look for a firmware update option and follow the on-screen instructions to update.

Firewall and Antivirus Settings

Disable Firewall Temporarily
  1. Panneau de contrôle: Open the Control Panel and navigate to “System and Security” > “Windows Defender Firewall.”
  2. Turn Off: Click on “Turn Windows Defender Firewall on or off” and select “Turn off Windows Defender Firewall” for both private and public networks.
  3. Check Connection: Try connecting to the internet again. Remember to re-enable the firewall afterward.

Antivirus Interference
  1. Open Antivirus Software: Launch your antivirus program.
  2. Check Network Settings: Look for any settings that might be blocking your internet connection.
  3. Disable Temporarily: Disable the antivirus software temporarily and check if the connection issue is resolved.

Advanced Troubleshooting

Safe Mode with Networking
  1. Restart PC: Reboot your computer.
  2. Access Safe Mode: Press F8 during startup and select “Safe Mode with Networking.”
  3. Check Connectivity: See if the internet connection works in Safe Mode.

Network Troubleshooter
  1. Ouvrir les paramètres: Go to “Settings” > “Update & Security” > “Troubleshoot.”
  2. Run Troubleshooter: Select “Internet Connections” and click “Run the troubleshooter.” Follow the prompts to resolve any detected issues.