了解如何将内容从一台设备屏幕镜像或投影到另一台设备。 注意: 无线显示应用在运行 Windows 11 版本 22H2 及更高版本的设备上可用。如果运行的是早期版本的 Windows，请在任务栏的搜索框中输入 “连接”，然后在结果列表中选择“连接”，从而启动 “连接” 应用。

To check for any security issues, go to Windows Defender settings, select Show details, and check your security status.

Important: Before trying any of the solutions below, make sure you back up your personal files. You can back up your Windows PC, or insert a USB drive and use File Explorer to drag and copy important files to the USB drive.If you’re signing into Windows with a Microsoft account, your system settings will be automatically restored after updating, once you’re connected to the internet.

Sometimes you need to make a change to your email account settings. If you have a new password, if your email provider has asked you to change settings, or if you're having problems with sending and receiving email, you can change your email account settings through Mail in the Windows Control Panel, or from Outlook.

That verification method isn’t working right now: Sometimes the block may be tied to the verification method you are using.Try using another verification method connected to your account. For example, if you are using SMS to verify yourself and are hitting a block, try using an alternate email that is connected to the account to receive your authorization code.

DPI 是用于测量鼠标灵敏度的标准，表示设备可以检测的 DPIs (每线性) 英寸的点数。 通过更改 DPI，你可以立即调整精度任务的指针速度，例如，游戏定位或照片编辑。

Windows セキュリティでウイルス対策機能を使って、マルウェア、ウイルス、その他の脅威から Windows PC を保護する方法を説明します。 Windows セキュリティの機能の理解とカスタマイズ Windows のセキュリティは、お客様のデバイスとデータを保護するツールを管理するためのホームです。

Before you set up an out of office or automatic reply in Outlook, you'll need to know your Outlook account type. The steps you'll follow will depend on whether you have a Microsoft Exchange Outlook email account (if you have email through an organization, such as the place where you work) or an IMAP or POP3 account (if you have an individual email account such as Yahoo or Gmail).

了解如何减小 Word 文档的大小。 在 “图像大小和质量”下，执行以下任一操作： 选择 “放弃编辑数据”。此选项将删除用于在编辑后将图像还原到其原始状态的存储数据。 请注意，如果放弃编辑数据，则编辑后将无法还原图像。

A list of Excel training, from entry level to advanced skills, plus templates and other resources.