查找 Windows 7 或 Windows 8.1 的产品密钥. 卸载或重新安装 Windows 7 或 Windows 8.1 时，通常需要产品密钥。 通常，如果购买的是实物 Windows 拷贝，产品密钥应该在标签上或者在 Windows 随附包装盒中的卡上。

欢迎使用适用于 Windows 的 便笺！ 打开便笺应用. 单击或点击“开始”按钮，然后键入便笺。 便笺将在你离开的位置打开。 如果在应用列表中看不到便笺，请打开 Microsoft Store 应用并安装Microsoft 便笺。

There are a few common scenarios in which Windows running on a PC might be discovered to be non-genuine during validation. Repairs. If your PC has been repaired, you might start to see messages on your desktop that Windows isn't genuine.

移动或复制单元格和单元格内容 文章; 更改 Excel 中的列宽或行高 文章; 查找或替换工作表上的文本和数字 文章; 合并和撤消合并单元格

Learn how to download, customize, and troubleshoot Windows Media Player 12 with helpful guides and tips.

与拥有手机、笔记本电脑或平板电脑的好友共享照片、视频或其他类型文件。 确保希望共享的其他设备已与你的电脑配对、已打开并且可以接收文件。了解如何配对

Important: If the individual you want to transfer the subscription to hasn't purchased it yet and they're also currently sharing your subscription, (for example, they're a member of your Microsoft Family), make sure you stop sharing with them before they activate the new subscription.

Learn how to manage the online safety and privacy settings on the Xbox console for you and every member of your family group.

In Visio Plan 1, you can view the following file formats: Visio Drawing (.vsdx), Drawing (.vsd), XML drawing, macro-enabled drawing (.vsdm).

To find Sync settings, select Start , then select Settings > Accounts > Sync your settings . Choose from settings such as language preferences, passwords, and color themes. If you turn on Other Windows settings, Windows also syncs some device settings (for things like printers and mouse options), File Explorer settings, and notification preferences.