Learn how to sign in and create app passwords for Microsoft apps and devices that don't support two-step verification.

A guide to help you identify and access your Microsoft account. How to check if your email is a Microsoft account? Go to the Microsoft account sign-in page at https://account.microsoft.com and enter your email address.

Use a ready signature template from a gallery to create your email signature in Outlook.

Learn how to restore files that have been permanently deleted and are no longer in the recycle bin on Windows 10.

About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

当设备准备好最新的 Windows 更新后，可以从“设置”中的“Windows 更新”页面下载它。

即使已开启其他防火墙，开启 Microsoft Defender 防火墙也很重要。 它保护你免遭未经授权的访问。 若要打开或关闭 Microsoft Defender 防火墙，请执行以下操作：

了解如何安装 Windows 7 Service Pack 1 (SP1)。 包含有关如何获取下载、要求和其他内容的信息。

Learn how to troubleshoot Windows activation errors. Browse common activation errors and learn what you can do to fix them.

See what's new in recent Windows 10 and Windows 11 updates, including a chat from the taskbar, widgets, snap groups, and more.