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。

We would like to show you a description here but the site won’t allow us.

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Learn about the latest feature updates and bug fixes for the OneDrive sync app across all devices.

To mark a message as important or urgent in Microsoft Teams, select Set Delivery Options ! beneath the compose box and then click Important or Urgent.

If you are having trouble with the camera in Microsoft Teams, we have some suggestions to help you get back on track. Solutions include: closing camera-related apps, updating device drivers, checking privacy settings.

Find solutions for common issues with Game Bar on Windows, including keyboard shortcut problems.

Learn what to do if Surface won’t turn on, turns on then off, or starts and gets stuck on a screen—a black screen, a screen with a logo, or another screen

In PowerPoint, learn how to troubleshoot Designer if you don't see the Designer button, no suggestions are offered, or the button is grayed out.

Correct the #N/A errorin the VLOOKUP function. INDEX and MATCH offers more flexibility with matches. INDEX and MATCH can find an exact match, or a value that is greater or lesser than the lookup value.