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

Learn how to download and install apps you need from your Microsoft 365 business subscription.

Try these solutions if you can't sign in to your Outlook.com, Hotmail, Live, or MSN email account, or you're not sure how to sign in or sign out.

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Learn how the Photos app for Windows lets you view photos and videos from your PC alongside those from OneDrive, and keeps them organized by date, album, or folder.

Learn how to earn Microsoft Rewards points when you browse the web with Microsoft Edge, search on Bing.com, and more.

Learn different ways to locate your BitLocker recovery key in Windows, and learn about how BitLocker might have been activated on your system.

Experience Microsoft Copilot on windows devices using the Copilot app! The Copilot app helps you get answers and inspiration from across the web, supports creativity and collaboration, and helps you focus on the task at hand.

Summary. Windows 10, versions 2004, 20H2, 21H1, and 21H2 share a common core operating system with an identical set of system files. Therefore, the new features in Windows 10, version 21H2 are included in the latest monthly quality update for Windows 10, version 2004, 20H2, and 21H1, but are in an inactive and dormant state.

Discover how to use Microsoft Phone Link to connect your Android or iPhone to your PC for seamless access to notifications, calls, and apps.