学习如何在 Windows 中解决 USB-C 问题，修复 USB 设备、端口和适配器无法正常工作。

If there was an unusual sign-in attempt for your account, you'll get an email or text message. We'll send a message to all your alternate contact methods.

Automated troubleshooting tools for Office to help you diagnose multitude of issues, such as crashes, hangs, configuration issues, etc.

When you're using a Microsoft 365 program with Windows, there are two ways to copy the contents of what you see on your screen (commonly referred to as a "screenshot" or "screen capture").

可以更改整个演示文稿的默认字体，而不是逐个更改幻灯片中的字体。 字体配对 (标题字体、正文字体) 是 PowerPoint 中的重要设计决策。

Informationen zum Anzeigen von Desktopsymbolen in Windows. Hinweis: Im Tablet-Modus werden die Desktopsymbole möglicherweise nicht ordnungsgemäß angezeigt.Sie können im Datei-Explorer nach dem Namen des Programms suchen.

我的产品密钥不起作用. 如果 Office 产品密钥不起作用，或已停止工作，应与卖家联系，申请退款。 如果产品密钥是独立于软件购买的，则很可能是被盗的产品密钥，或者是以欺骗方式获得随后阻止使用的产品密钥。

Learn how to insert data from a picture with Excel - and you can use your smartphone or tablet to take the picture. Excel's powerful AI capabilities can convert your hand written or printed data into a table.

Training: Get started with SharePoint in Microsoft 365. At office.com, sign in to SharePoint, then select the SharePoint tile.

Keeping leading zeros and large numbers in Excel. Use a custom format to keep the leading zeros. If you want to resolve the issue just within the workbook because it's not used by other programs as a data source, you can use a custom or a special format to keep the leading zeros.