Ouais j'ai moi aussi eu ce problème de connexion à plusieurs reprises. Très chiant, ça pourrait venir de ça:
https://support.microsoft.com/en-us/help/4577063/windows-10-update-kb4577063
"...
- Addresses an issue that might prevent applications from opening or cause other errors when applications use Windows APIs to check for internet connectivity and the network icon incorrectly displays “No internet access” in the notification area. This issue occurs if you use a group policy or local network configuration to disable active probing for the Network Connectivity Status Indicator (NCSI). This also occurs if active probing fails to use a proxy and passive probes fail to detect internet connectivity.
...
- Addresses an issue with certain WWAN LTE modems that might show no internet connection in the notification area after waking from sleep or hibernation. Additionally, these modems might not be able to connect to the internet.
..."
Tu peux donc essayer d'aller dans:
- "Paramètres" -> "Windows Update" -> "Afficher les mises à jour facultatives",
- Ensuite chercher le patch "kb4577063" et l'appliquer. Cette update sera sûrement ajoutée automatiquement au mois d'octobre.
Allez, va pour la mitraille Gredin!