Learn how to find your Windows product key for activation or when to use a digital license instead.

Here are the most likely causes for an unrecognized charge: A Microsoft subscription has recurring billing enabled. Someone you know, such as a family member, bought something with your card. You can now investigate this on the Manage your payments page. A previously declined charge was charged again. A pre-order or split order was shipped.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

如果你收到错误消息（例如：“请咨询你的银行。”），请在下面的“错误消息”下选择你收到的特定消息。如果你收到错误代码（例如：“8012271F”），请在“错误代码”下查找该特定代码。 在 Xbox 上进行购买时收到错误消息或错误代码？了解它们的含义。

获取有关损坏或不可读代码的帮助. 如果无法读取数字代码的全部 25 个字符，则需要通过联系 aka.ms/contactxboxsupport 请求替换代码。. 联系支持人员时，请确保提供购买证明、序列号和损坏代码的图片。. 注意 请拍摄卡片正面和背面的图片，或拍摄打印代码的收据 ...

如何在 Windows 版 Xbox 应用中兑换代码. 按“开始”按钮 ，然后在“搜索”框中输入“Xbox”。. 从结果中选择 Xbox 应用以打开该应用。. 选择左上角的玩家图片，然后选择“设置”。. 在“兑换代码”下选择“兑换”。. 输入由 25 个字符组成的代码，选择 下一步 ...

This article is intended for users who are not able to upgrade to Windows 11 because their PC is not currently Secure Boot capable. If you are unfamiliar with this level of technical detail, we recommend that you consult your PC manufacturer’s support information for more instructions specific to your device.

Create a simple formula to multiply and divide in an Excel spreadsheet. You can multiply two or more numbers in one cell or multiply and divide numbers using cell references. All formulas in Excel begin with an equal sign (=).

Microsoft 已暂停在俄罗斯和白俄罗斯的新Skype购买。 这包括购买新的Skype订阅、Skype号码、Skype额度和赠送Skype额度。对于俄罗斯和白俄罗斯的现有客户，免费Skype服务、现有订阅、Skype号码和Skype额度不会受到影响，并将继续正常使用。详细了解 Microsoft...

Microsoft will never proactively reach out to you to provide unsolicited PC or technical support. If you receive a phone call claiming to be from Microsoft, or see a pop-up window on your PC with a fake warning message and a phone number to call and get your “issue” fixed, it’s better to be safe and not click any links or provide any personal information.