Guide d'achat
· 6 min de lecture· Mis à jour le 2026-02-09Comment activer Windows 11
Guide pas à pas pour activer Windows 11 avec une clé produit Retail — nouvelle installation, mise à niveau depuis Windows 10, résolution des problèmes.
- Windows 11
- Activation
- Guide

Avant de commencer
Vous aurez besoin de : la clé produit à 25 caractères (xxxxx-xxxxx-xxxxx-xxxxx-xxxxx), d'une connexion Internet et de 5 minutes.
Si vous effectuez une mise à niveau depuis une licence Windows 10 authentique, il se peut que vous n'ayez pas besoin d'une nouvelle clé — Windows 11 hérite automatiquement de l'activation Windows 10.
Étape 1 — Ouvrir les paramètres d'activation
Appuyez sur Win + I pour ouvrir les Paramètres. Accédez à Système → Activation. Vous verrez l'état actuel — généralement « Windows n'est pas activé » jusqu'à ce que vous entriez une clé.
Étape 2 — Modifier la clé de produit
Cliquez sur « Modifier la clé de produit », saisissez la clé à 25 caractères dans le format affiché par Microsoft, cliquez sur Suivant, puis sur Activer.
Windows contacte les serveurs d'activation de Microsoft et confirme en quelques secondes. La page d'activation doit afficher « Windows est activé avec une licence numérique ».
Étape 3 — Lier à votre compte Microsoft
Une fois activé, connectez-vous à un compte Microsoft (Paramètres → Comptes → Vos informations). Cela lie la licence numérique à votre compte pour vous permettre de réactiver sur le même PC après une installation propre ou un changement de matériel.
Résolution des problèmes
Erreur 0xC004C003 (Clé non valide) : vérifiez la clé — elle comporte 25 caractères sans espace supplémentaire. Ouvrez l'e-mail exactement tel que nous vous l'avons envoyé.
Erreur 0x80072EE7 / 0x8007232B : les serveurs d'activation sont inaccessibles. Vérifiez vos paramètres DNS ou votre VPN ; l'activation nécessite un accès direct à Microsoft.
Erreur 0xC004F050 (Clé bloquée) : rare avec les clés Retail. Envoyez-nous votre numéro de commande par e-mail et nous la remplacerons dans l'heure.
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