Uninstall or remove apps and programs in Windows. There are different ways to remove apps and programs, so if you can't find the one you're looking for, you can try another location. Note that some apps and programs are built into Windows and can't be uninstalled.

Download and install or reinstall Microsoft 365 or Office 2021 on a PC or Mac. Set up Office apps and email on a mobile device. Small business help and learning. Learn how to download and install apps you need from your Microsoft 365 business subscription.

Help for admins of small businesses. Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Learn more about product keys, Workplace Discount Program, and volume licenses. Some Office 2019, Office 2016, and Office 2013 products come with a product key. If yours did, before installing Microsoft 365 for the first time, sign in with an existing or new Microsoft account and enter your product key at office.com/setup.

This article applies if you’ve recently made changes to your device hardware and are trying to upgrade to Windows 11. Hardware changes might affect your upgrade eligibility, though you’ll need to take a few steps to see your updated eligibility in Settings.

If you're looking for Help on specific Excel Add-ins, such as Solver or Inquire, see Help for Excel for Windows add-ins. If you're looking for additional help with Excel add-ins using the COM Add-ins dialog box, see Add or remove add-ins in Excel. Get a Microsoft 365 Add-in for Excel.

Learn how to add user accounts in Windows 10 and Windows 11. With an account, each person has separate files, browser favorites, and a private desktop.

验证你拥有许可证后，无论何时需要安装或重新安装 Microsoft 365，都可以直接转到下一部分，即登录以下载 Office，然后选择相应的选项卡，以获得有关 PC 或 Mac 安装的步骤。. 你将使用这些版本的 Microsoft 365 的工作或学校帐户进行登录。. * 如果没有产品密钥或 ...

下载并安装或重新安装 Office 2019、Office 2016 或 Office 2013. 如果这是你 第一次 安装 Microsoft 365，则可能需要先执行一些设置步骤。. 展开下面的 “了解详细信息”部分。. 但是如果是重新安装 Microsoft 365，且已兑换了产品密钥并拥有与 Microsoft 365 相关联的帐户，请转 ...

Below we describe how to install the desktop app that is included with Visio Plan 2, and non-subscription versions of Visio Professional or Visio Standard 2021, 2019, or 2016. If you have Visio Plan 1 see the steps under the tab Visio for the web.