Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

However, if a product key is required, it can usually be found in the confirmation email you received after purchasing Windows, or in the box Windows came in. Microsoft doesn't keep a record of purchased …

If you used a product key to get to Windows 10, then you’ll need that key again after the hardware change. To find out how to locate your key, see Find your Windows product key.

To find your Windows product key, see Find your Windows product key. If you have a digital gift card that's good for a game or app, see Redeem a gift card or code to your Microsoft account.

Erfahren Sie, wie Sie einen Windows-Product Key für die Aktivierung finden und wann Sie stattdessen eine digitale Lizenz verwenden.

Learn how to find your product key for Office 2010 or locate a lost Microsoft Office 2010 product key.

Scopri come trovare un codice Product Key di Windows per l'attivazione e quando userai una licenza digitale.

You won't receive a product key from your PC manufacturer unless you paid for an Microsoft 365 product key card. Instead, you can start a trial of Microsoft 365 Family, or buy Microsoft 365.

Activation helps verify that your copy of Windows is genuine and hasn’t been used on more devices than the Microsoft Software License Terms allow. This article will help you troubleshoot and fix common …