Find Microsoft Excel help and learning resources. Explore how-to articles, guides, training videos, and tips to efficiently use Excel.

PC Health Check app brings you up to date info on your Windows device health, helping you take action to improve your device performance and troubleshoot performance problems. It is periodically updated based on customer feedback to help you make the most of your Windows PC.

Learn how to connect your Windows PC to external monitors and adjust the display settings.

Windows 更新相关主题 如果在尝试更新时遇到错误，或者安装更新时遇到问题，请参阅 解决更新 Windows 时出现的问题。 如果收到 Windows 更新的警告，表明设备上没有足够的空间来安装更新，请参阅 释放空间用于 Windows 更新。 如果“检查更新”未自动提供最新版本，你可以通过 Windows 更新助手 手动 ...

Learn how to check for the latest Windows Updates and install them to keep your device running smoothly and securely.

Install a wired or local printer In most cases, local or wired printers will install automatically in Windows after they're plugged into the Windows device and the printer is turned on. If a printer doesn't install automatically: Make sure the printer is plugged into the Windows device, for example via USB, and that the printer is turned on. Select Start > Settings > Bluetooth & devices ...

注意 Microsoft Authenticator 不 适用于电脑或 Mac，因为出于安全原因，验证器应用是专为智能手机设计的。 了解详细信息。 Microsoft 不再支持超过一年的 Authenticator 版本。 始终使设备保持最新。 中国用户应阅读 如何在中国下载和使用 Microsoft Authenticator。

Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.

Learn how to troubleshoot problems updating Windows. Find answers to common questions and issues installing Windows updates.

Learn how to use Snipping Tool to capture a screenshot, or snip, of any object on your screen, and then annotate, save, or share the image.