How to install the latest version of DirectX - Microsoft Support
Learn how to install the latest version of DirectX to enable games and multimedia applications on your system.
如果文件资源管理器不能打开或启动，进行修复 - Microsoft 支持
若要在Windows 11中打开文件资源管理器，请在任务栏上选择“文件资源管理器 ”或按键盘上的 Windows 徽标键 + E。. 如果无法打开文件资源管理器，下面是一些可以尝试的方法。
Change your browser home page - Microsoft Support
Get the steps for changing your home page in Microsoft Edge, Internet Explorer 11, Google Chrome, Firefox, and Safari.
IF function - Microsoft Support
How to use the IF function in Excel to make logical comparisons between data values.
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016
Change the email address or phone number for your Microsoft account
Learn how to change Microsoft account email address or phone number using aliases to sign into your Microsoft account.
Applies To:
Microsoft account dashboard
What's the difference between Microsoft 365 and Office 2021?
Learn about the differences between a Microsoft 365 subscription, Office 2016, and the free Office Online apps.
Applies To:
Office 2021, Office 2021 for Mac, Office 2019, Office 2019 for Mac, Microsoft 365 for home, Office for business, Microsoft 365 admin
Install and use a scanner in Windows 10 - Microsoft Support
Learn how to install a scanner and use it to scan pictures and documents in Windows 10.
Fix network connection issues in Windows - Microsoft Support
If you’re having problems getting connected to a network and can’t get onto the Internet, here are some things you can try in Windows.
Get Windows Media Player - Microsoft Support
Learn how to get Windows Media Player 12 for Windows 10, Windows 8.1, and Windows 7.
How to get and use app passwords - Microsoft Support
Learn how to sign in and create app passwords for Microsoft apps and devices that don't support two-step verification.