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。

当你尝试登录帐户时，或者当你在 Windows 10 上启动或安装游戏时，可看到以下错误代码：

With External Access for Teams, you can add or invite anyone outside of your Teams org who uses Teams, Teams for personal use, Skype (for consumers), and Skype for Business to a one-to-one chat.

了解如何为你的打印机安装最新驱动程序。 如果最近升级了 Windows，你的打印机驱动程序可能需要重新安装。

Join your work-owned Windows 10 device to your organization's network so you can access potentially restricted resources. What happens when you join your device

Find out how to request a replacement for your Xbox controller.

如果無法登入您的 Outlook.com、Hotmail、Live 或 MSN 電子郵件帳戶，或者您不確定如何登入或登出，請嘗試這些解決方案。

PC 版 Game Pass 计划让你可以在 Windows 10/11 设备上畅玩一组高质量的电脑游戏。 体验 PC 版 Game Pass 的最佳方式是使用适用于 Windows 的 Xbox 应用，可从 Microsoft Store 或以下位置下载：

When you sign into the Xbox PC app, the Microsoft account associated with your Xbox profile will be used in the Xbox app for access to Xbox Game Pass and all other purchases, including rights to purchased games.

You can add your credit card, debit card, bank account, PayPal account, or mobile phone as a new payment method for your Microsoft account.