即使应用关闭或设备处于锁定状态，闹钟和计时器也能正常工作。 如果看到警告，通知仅在设备处于唤醒状态时显示，请确保设备未进入睡眠状态， (转到 “开始 > 设置” > 系统 > 电源 & 睡眠 “以调整设备的睡眠设置) 。

This update provides latest updates for Windows Security platform, which is comprised of the Windows Security app and its underlying service. To obtain the current version of Windows Security app, please run powershell command below:

若要升级到 Windows 11，需要硬盘上有足够的空间进行安装。 若要查看计算机上可用的硬盘空间，请选择任务栏上的"文件资源管理器 (在Windows 7) 中称为Windows资源管理器，或按Windows徽标键 + E。 然后，选择“计算机”或“这台电脑”，并在“硬盘驱动器”或“设备和驱动器”下进行查看。

If you get an email about unusual activity on your Microsoft account, or if you’re worried that someone else might have used your account, go to the Recent activity page.You’ll see when your Microsoft account was signed in during the last 30 days, along with any device or app-specific info.

Test your camera with the Camera app. Select Start , then choose Camera from your apps. If you're asked to allow access to the Camera, select Yes.If the camera works in the Camera app, the problem might be with the app you're trying to use.

Windows 7 支持已于 2020 年 1 月 14 日结束。 我们建议你转到 Windows 11 电脑来继续从 Microsoft 接收安全更新 ... 在搜索框中，输入“疑难解答”，然后从结果 列表中选择“疑难解答”。 在“系统和安全”下，选择“使用 Windows 更新解决问题”，然后按照说明 ...

Windows Media Player 12 では、再生できる音楽とビデオの形式が増え、より多くの場所にストリーム配信できるようになりました。 * Windows Media Player 12 は、windows 10 のクリーンインストール、windows 8.1 または Windows 7 からの Windows 10 へのアップグレード ...

Turn your PC off completely. To shut down, select Start and then select Power > Shut down.. Sleep. Sleep uses very little power, your PC starts up faster, and you’re instantly back to where you left off.

Windows Media Player is available for Windows-based devices. Use this table to find the right version of the Player for your system. (If you've got a Mac, you can download Windows Media Components for QuickTime to play Windows Media files.)

Learn how to install the latest version of DirectX to enable games and multimedia applications on your system.