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

了解如何安装 Windows 7 Service Pack 1 (SP1)。 包含有关如何获取下载、要求和其他内容的信息。

If Office activation fails, you'll see Unlicensed Product or Non-commercial use / Unlicensed Product in the title bar of your Office apps, and most features of Office are disabled. To restore all features of Office, you'll need to fix the problem that's causing activation to fail.

介绍如何激活 Visio 的永久许可证。 这包括如何使用互联网或通过电话有效使用永久许可证。 您也可以稍后跳过激活并激活 ...

This page is for Microsoft 365 Basic, Microsoft 365 Personal, and Microsoft 365 Family subscriptions only. For help with other subscriptions purchased through Microsoft see Cancel a Microsoft subscription. If you purchased a Microsoft subscription from Google Play or the Apple app store, contact their customer support for cancellation or refund.

Get help for the account you use with Microsoft. Find how to set up Microsoft account, protect it, and use it to manage your services and subscriptions.

下面的步骤介绍如何更改 已知 密码。 如果你因忘记密码而需要 重置 密码，请参阅 重置 Microsoft 帐户密码 。. 更改密码. 转到 account.microsoft.com，如果你尚未登录，则使用要更新的帐户的用户名和密码登录。

Find out how to manage your Xbox subscriptions to request a refund or cancel a recurring payment.

症状. 当你离开家并使用家庭电子邮件帐户发送电子邮件时，你的电子邮件可能会返回并显示 550、553 或中继禁止的错误消息。

如果知道用户名和密码但已停止工作，请阅读 我的用户名和密码已停止工作。. 如果你忘记了 Microsoft 帐户用户名或电子邮件地址， 并且 之前已在 Microsoft 帐户上设置了其他 安全信息 ，请按照以下步骤操作。