Note: This topic is for Microsoft 365 for business.If you have an Office for home product and you're looking for where to install Microsoft 365, see Install or reinstall Office on a PC or Mac.To see what Office for home products you have a license for, sign in with your Microsoft account to Services & subscriptions.

Even though most things are changing to Microsoft 365, Office is not going away entirely. Existing Office 365 subscription plans will be unaffected. And we'll continue to offer one-time purchase options, such as Office 2021, and Office LTSC plans. Still have questions? See the Microsoft 365 FAQ.

You can add comments to cells. When a cell has a comment, an indicator appears in the corner of the cell. When you hover your cursor over the cell, the comment appears.

Here are some solutions to common problems with the new Microsoft Edge . If Microsoft Edge keeps crashing. If you can't open Microsoft Edge, or if it opens briefly and then closes, or if you’re unable to open specific webpages, here are some things you can try.

A Windows product key is a 25-character code used to activate Windows. It looks like this: PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. Locate your product key for Windows 10 or Windows 11

如果你因为收到一条错误消息，指出 PowerPoint 无法读取文件或无法打开演示文稿，则可能是因为 Microsoft 365 出于安全原因阻止了该文件。

Office 小型企业版、Office 家庭和学生版以及 Office 专业版可在单台计算机上安装。 如果尝试在另一台（自己所有的或其他人所有的）计算机，或者硬件更改后的同一台计算机上安装和激活这些版本的 Office，则可能会看到一条错误消息，提示你已达到最大激活数量。

Microsoft 365 for business If your business subscription plan includes the desktop version of the Microsoft 365 apps you won't see an option to install it unless someone in your organization assigned a license to you.. Learn how to check this in What Microsoft 365 business product or license do I have? or if you're a Microsoft 365 admin responsible for assigning licenses to people in your ...

检查你的版本. DirectX 是许多 Windows 游戏都需要的一种多媒体技术套件。 如果你的电脑未安装正确版本的 DirectX（产品包装盒上应标有所需的版本），游戏可能无法正常运行。

In the following countries, you have the right to cancel a subscription that has recurring billing with immediate effect and receive a prorated refund as described in the Microsoft Consumer Subscription Prorated Refund Policy: