Turn Windows Security on or off - Microsoft Support
Windows Security is pre-installed on Windows 10 and ready for you to use at any time.
Start your PC in safe mode in Windows - Microsoft Support
Find out how to boot into safe mode in Windows from Settings, the sign-in screen, and a black or blank screen.
Look up values with VLOOKUP, INDEX, or MATCH - Microsoft Support
Learn how to use VLOOKUP, INDEX, or MATCH to search for data in Excel. Get a quick refresher and more tips from Microsoft Support.
Applies To:
Excel for Microsoft 365, Excel for the web, Excel 2021, Excel 2019, Excel 2016
创建适用于 Windows 的安装介质 - Microsoft 支持
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。
Account has been locked - Microsoft Support
Learn how to unlock your Microsoft account and resolve 'account has been locked' error message.
Print in Microsoft Edge - Microsoft Support
Learn more about how to print web pages and documents in Microsoft Edge.
Comment se connecter et se déconnecter d’Outlook.com
Si vous ne parvenez pas à vous connecter à votre compte de messagerie Outlook.com, Hotmail, Live ou MSN, ou si vous ne savez pas comment vous connecter ou vous déconnecter, voici quelques solutions.
Applies To:
Outlook.com
Create films with a video editor - Microsoft Support
Learn how to use Clipchamp to create, edit, and share your own custom videos.
Make a checklist in Word - Microsoft Support
How to create a checklist in Word that can be filled out by using checkbox controls.
Applies To:
Word for Microsoft 365, Word for the web, Word 2021, Word 2019, Word 2016
Create and add an email signature in Outlook.com or Outlook on the web
Learn how to create and add a signature to email messages you send in Outlook.com.
Applies To:
Outlook on the web, Outlook.com, Outlook on the web for Exchange Server 2016, Outlook on the web for Exchange Server 2019