Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.

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 redeem a gift card, code, or Office product key and spend your balance at Microsoft Store online, on Windows, or Xbox.

If you’re having sound or audio problems, the following suggestions might help. The tips are listed in order, so start with the first one, see if that helps, and then continue to the next one if it doesn’t.

Learn how to create installation media for installing or reinstalling Windows 7, Windows 8.1, or Windows 10.

There are different ways to remove apps and programs, so if you can't find the one you're looking for, you can try another location. Note that some apps and programs are built into Windows and can't be uninstalled. You can try to repair a program first, if it's just not running correctly.

If you’re working on a Windows PC and want the apps and content from another device to show on your PC screen, you’ll want to consider mirroring that device‘s screen or projecting it to your PC. Note that you’ll need a device that supports Miracast. Here’s how to mirror another screen or project to your PC.

登录到 Hotmail 或 Outlook.com. 若要登录到 Hotmail，需要提供 Microsoft 帐户用户名和密码。. 提示: 登录时，如果你希望下次直接进入你的邮箱，请在“保持登录?”提示中选择“ 是 ”（对于共享计算机，不建议这样做）。. 或者，选中“不再显示此内容”框，然后选择 ...

你可以使用安装介质（U 盘或 DVD）来安装 Windows 的新副本、执行全新安装或重新安装 Windows。. 要创建安装介质，请转到 软件下载网站 ，你可以在这里找到分步说明。. 在该网站上，你可以选择 Windows 版本，并使用 U 盘或 DVD 创建自己的安装介质。. 要直接转到 ...

To adjust power and sleep settings in Windows 11, select Start > Settings > System > Power & battery > Screen and sleep.