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Get Microsoft billing support. Find help with Microsoft Store purchases, subscriptions, refunds, payment options, and checking your order history.

如果你有业务订阅，并且已准备好订阅 Microsoft 365 Copilot ，请访问 Copilot for Microsoft 365。 如果你已经是订阅者， 请在此处开始。 如果你有企业订阅，请致电Microsoft帐户代表购买 Microsoft 365 Copilot 。

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There's no limit to how many times you can make changes to a sent message. Delete a sent message. If you need to backtrack and delete something you just sent, go to the message and select More options > Delete.. If you haven't sent the message yet, select Format to expand the box and then click Delete in the upper right-hand corner.. Undo a deleted message

Change your default security info method. If you want text messaging to be the default method used when you sign in to your work or school account using two-factor verification or for password reset requests, you can set it from the Security info page.

提示: 如果已设置语音识别，请按 Windows 徽标键 +Ctrl+S 打开语音识别，即可使用它。 如果想要重新训练计算机以识别你的声音，请按 Windows 徽标键 ，键入“ 控制面板 ”，然后在结果列表中选择“控制面板”。 在“控制面板”中选择“轻松使用”>“语音识别”>“训练计算机以提高其理解能力”。

介绍 Microsoft 手机连接 我们对之前的“你的手机”应用的演变为用户体验提供了一个新名称。 使用 Windows 电脑上的新“手机连接”和 Android 设备上的新“连接至 Windows”应用，访问移动应用和内容从未如此简单！

Cause. The device has no drivers installed on your computer, or the drivers are configured incorrectly. Recommended Resolution. Update the Driver. In the device's Properties dialog box, click the Driver tab, and then click Update Driver to start the Hardware Update Wizard.Follow the instructions to update the driver.

可能需要在带有云游戏的 Microsoft 外部测试版模拟器发布 24 小时后，游戏才会出现在流媒体上。 如果看不到带有云游戏的 Microsoft 外部测试版模拟器，请尝试注销并重新登录到主机或应用。