连接问题可能出于各种原因—网站、设备、Wi-Fi 路由器、调制解调器或 Internet 服务提供商 (ISP) 出现问题。 请尝试以下步骤以帮助缩小问题的根源。 如果任务栏右侧显示“Wi-Fi 已连接”图标 ，请访问其他网站。 如果网站已打开，则特定网站可能存在问题。

To open the Start menu—which contains all your apps, settings, and files—you can do any of the following: On the center or left end of the taskbar, select the Start icon.

Note: In earlier versions of Outlook, IMAP accounts also used an Outlook Data File (.pst).In Outlook 2016 and Outlook for Microsoft 365, IMAP accounts use Offline Outlook Data Files (.ost). You can also use an Outlook Data File (.pst) to backup or export items from any type of email account.

To reset the Hosts file back to the default, follow these steps: 1. Open Notepad. To do this, search for “Notepad” using Cortana, and then tap or click the Notepad icon.. 2. Copy the following text, and then paste the text into the file:

Internet Explorer 11 support ended on June 15, 2022. We recommend you use Microsoft Edge for a faster, more secure and more modern web browsing experience.

A factor in authentication is a way of confirming your identity when you try to sign in. For example, a password is one kind of factor, it's a thing you know.

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。 如果你运行的 Windows 版本不受支持，或者你的电脑不符合运行Windows 11的最低系统要求，请考虑迁移到新的Windows 11设备。 查找满足你需求的电脑。

The Office Document Cache contains the files Office uses to make sure your changes are saved in the cloud. Sometimes when you use Office with other apps in the cloud, the apps fail to sync properly before you close Office and this can damage, or corrupt, your Office Document Cache.

Important: When you close your Microsoft account, your email and contacts are deleted from our servers and can't be recovered.If you use your Microsoft account with Xbox, Skype, OneDrive, or other Microsoft services, you'll no longer be able to access those services.

In the Export Registry File dialog box, select the location to which you want to save the backup copy, and then type a name for the backup file in the File name field.