Note: If you don’t see the Change link, it may be because some information, such as your name, photo, or title, is collected from systems that your IT or human resources department control.If you want to update those details, contact your administrator. If you need help finding your administrator, see How do I find out who my admin is?

了解如何从 Windows 10 家庭版升级到 Windows 10 专业版或从 Windows 11 家庭版升级到 Windows 11 专业版，包括如何使用有效产品密钥或 Microsoft Store。

Clean up your inbox and keep your email organized with automatic filtering and sorting, and by using tools on the command bar like Sweep, Archive, and Move to.

Learn how to install Skype for Business on your Windows computer, mobile device, or Macintosh.

Learn how to access Windows device security settings in Windows Security to help protect your device from malicious software.

Learn how to unlock your Microsoft account and resolve 'account has been locked' error message.

With External Access for Teams, you can add or invite anyone outside of your Teams org who uses Teams, Teams for personal use, Skype (for consumers), and Skype for Business to a one-to-one chat.

Learn how to redeem your Microsoft Rewards points for a huge variety of great products and sweepstakes.

After launching an Office app, you might receive a message that says Get genuine Office.. If you see this, we've determined that the Office product installed on your device isn't legitimate and you may be a victim of software counterfeiting.

Learn what to do if you receive a message in Mail or Calendar for Windows 10 that your account settings are out of date.