Learn how to find the serial number on your Surface so you can register your product or request service.

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.

Defragment your Windows 10 PC. Optimizing your drives can help your PC run smoother and boot up faster.

O Hotmail é agora Outlook.com. Saiba como iniciar sessão para aceder ao seu Outlook.com, Hotmail, Live, ou conta de e-mail MSN.

Get help when Windows can't find the camera

In Word, you can create a form that others can fill out and save or print. To do this, you will start with baseline content in a document, potentially via a form template.

Learn how to troubleshoot and fix problems setting up your email in Outlook.

可以通过使用 USB 电缆、适用于 Windows 的 Xbox 无线适配器或蓝牙将控制器连接到 Windows 设备。 有些 Windows 设备还附带了 Xbox 无线功能，因此无需适配器即可直接连接控制器。

Check your network connection status in Windows. Windows 11 lets you quickly check your network connection status. Select the Start button, then type settings.Select Settings > Network & internet.The status of your network connection will appear at the top.

Learn how to get Microsoft account help, troubleshoot sign in issues, keep your account secure, and manage your Microsoft account dashboard.