Locate the device that you want to check the warranty on, then select Info & support.

如何兑换礼品卡、Xbox 下载代码或令牌. Microsoft 和 Xbox 礼品卡以及下载代码和令牌的工作方式相同：兑换到 Microsoft 帐户后，可以在 Windows 或 Xbox 上将余额用于Microsoft Store 在线商店，并且可以获取最新应用、游戏、电影、电视节目以及 Surface、Xbox 和配件的下载。

Why some files won't open in Internet Explorer. Internet Explorer uses add-ons such as Adobe Reader to view some files in the browser. If a file that needs an add-on won't open, you might have an older version of the add-on, which needs to be updated.

浏览器会自动保存临时 Internet 文件，以帮助加快页面加载速度。 清除此项缓存有时可以解决页面显示问题。 如果可以打开 Microsoft Edge，请选择“设置及更”“多” > “历史记录” >“清除浏览数据”。 在“时间范围”下选择“所有时间”；选择“浏览历史记录”和“缓存图像和文件”，然后选择 ...

Refunds are typically issued for requests meeting the following criteria: Requests are made within 14 days of the purchase date; Requests are for games in which you haven’t accumulated a significant amount of play time

Important: The Assistant will, in most cases, modify the registry and move files from startup folders used by Excel. Before you run the Assistant, make sure that you back up the registry and all files in startup folders used by Excel so that you can restore the registry and backed-up files if a problem occurs.

尚未运行 Windows 11？ 请参阅激活 Windows或激活 Windows 7 或 Windows 8.1。. 尝试“激活疑难解答” 如果运行的是 Windows 11，并且最近更换了重要的硬件（如更换主板）或重新安装了 Windows，则“激活疑难解答”有可能帮助重新激活 Windows。

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

To verify that your digitally signed message was received unaltered by the intended recipients, select the Request S/MIME receipt for all S/MIME signed messages check box. You can request notification telling you who opened the message and when it was opened, When you send a message that uses an S/MIME return receipt request, this verification information is returned as a message sent to your ...

Get help with your questions about Microsoft Teams from our how-to articles, tutorials, and support content.