Open a service request in the Microsoft 365 admin center. This service is free. Get help and support, whether you're shopping now or need help with a past purchase. Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Cast to a Windows PC from another Windows PC. On the PC you'd like to project from, select Start > Settings > System > Projecting to this PC . Under Add the “Wireless Display” optional feature to project to this PC, select Optional features . Next to Add an optional feature, select View features, then enter “wireless display.”.

注意: 如果看到了打开定期计费，而不是显示“管理”的链接，这意味着你的订阅已设置为在显示的日期到期，且在此日期之后不会自动扣费。目前没有进一步的操作，你可以继续使用该产品，直到订阅过期。

In the Settings app on your Windows device, select Accounts > Sign-in options or use the following shortcut: Sign-in options. Under Ways to sign in , you have three choices to sign in with Windows Hello: Select Facial recognition (Windows Hello) to set up facial recognition sign-in with your PC's infrared camera or an external infrared camera.

How to open PC Health Check. In Windows, use Search on the taskbar to search for “PC Health Check,” then select it from the list of results. If a PC Health Check update is available, you can quickly install it for the latest version. If you don't have PC Health Check installed, you can install it by going to https://aka.ms ...

Here's how: Select Search , then type computer management. Select Computer Management from the list of results. In the console tree, select the arrow to expand Services and Applications, and then select Services. In the details pane, right-click or swipe down on Windows Installer, and then select Start. Describes how to use the clean boot ...

First, launch Windows Backup: select Start , type windows backup, and select Windows Backup from the results. (Or you can select Start > All apps > Windows Backup .) Then select Folders to drop it down, and select which of your user folders you want to back up to OneDrive: You can back up your Desktop, Documents, Pictures, Videos, and Music ...

Where can I find my BitLocker recovery key? BitLocker likely ensured that a recovery key was safely backed up prior to activating protection. There are several places that your recovery key may be, depending on the choice that was made when activating BitLocker:

Tips: While signing in, select Yes at the "Stay signed in?" prompt if you want to go straight to your mailbox next time (not recommended for shared computers). Alternatively, check the "Don't show this again" box and select No to be prompted for your password each time.. If you can't sign in, or have forgotten your username or password, use our sign-in troubleshooter.

Enable virtualization on Windows 11 PCs. Virtualization lets your PC emulate a different operating system, like Android™ or Linux. Enabling virtualization gives you access to a larger library of apps to use and install on your PC. If you upgraded from Windows 10 to Windows 11 on your PC, these steps will help you enable virtualization.