Tip: If you're already in Word for the web, get to the letter templates by going to File > New, and then below the template images click More on Office.com. You'll be on the Templates for Word page. In the list of categories, click Letters.

Microsoft support is here to help you with Microsoft products. Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows, Surface, and more.

A product key is a 25-character code that's used to activate Windows and helps verify that Windows hasn't been used on more PCs than the Microsoft Software License Terms allow.

Windows 允许添加多个用户帐户以使用同一设备，使每个用户都有自己的设置、文档和应用程序。 例如，家长可以拥有自己的具有管理权限的帐户来管理设置和安装软件，而孩子可以拥有启用了家长控制的标准帐户来监视和限制其使用情况。

Note If the price for your Xbox subscription has changed, it may be because the subscription renewed after a trial or promotional rate to the full rate. You should be notified ahead of time if the full rate for a subscription changes for your region.

Summary. MSN is the Microsoft information and entertainment network. MSN offers Internet subscriptions and services. This article describes how to contact MSN Customer Support.

Windows Hello 是登录到 Windows 设备的一种更个性化、更安全的方式。 在 Windows Hello 中，你可以使用面部识别、指纹或 PIN 登录，而不是使用密码。

Billing & payments. Your dashboard is also where you can: Buy, renew, or cancel a subscription.

Important: Microsoft accounts, the Windows operating system, and other Microsoft products include passwords to help secure your information.This article provides some options that you can use to reset or recover your password if you forget it. Be aware that, if these options don’t work, Microsoft support can't help you retrieve or circumvent a lost or forgotten password.

If you can't sign into your Microsoft account, most issues can be identified by our sign-in helper tool. The tool will ask you to enter the email address or mobile phone number you're trying to sign in with and check the details you provide.