Learn about the circular reference warning message. The first time Excel finds a circular reference, it displays a warning message. Select OK or close the message window. When you close the message, Excel displays either a zero or the last calculated value in the cell.

Enter your Email, phone, or Skype name in the first box if you know it.; In the Contact email address text box, type an email address where we can contact you or send your password reset link. Note that this email address should be different from the one you’re trying to recover. In the third text box, type the characters displayed on the screen.

从确保设备可以运行 Windows 11 到备份文件和安装 Windows 11，了解如何为 Windows 11 升级做好准备。

It's a good idea to create a recovery drive. That way, if your PC ever experiences a major issue such as hardware failure, you'll be able to use the recovery drive to reinstall Windows 11.

In order to sync with OneDrive for work or school, the DisableFileSyncNGSC key must be removed or the DWORD value must be changed to 0 (zero). If the registry value was set as part of a Group Policy Object, the policy must be removed.

在最多 300 人的中大型会议中使用分组讨论室，以促进更多的个人联系和有意义的讨论。 使用 Teams 桌面版的会议组织者可以创建和管理分组讨论室。

Windows 11, version 21H2; October 8, 2024—KB5044280 (OS Build 22000.3260) September 10, 2024—KB5043067 (OS Build 22000.3197) August 13, 2024—KB5041592 (OS Build 22000.3147)

Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

Turn AutoCorrect on or off in your document

Instead of fix-it tools, Windows 10 uses troubleshooters to help you solve problems with your PC. To run a troubleshooter: Select Start > Settings > Update & Security > Troubleshoot > Additional troubleshooters, or select the Find troubleshooters shortcut at the end of this topic, and then select Additional troubleshooters.