Before you begin, make sure your PC or Mac meets the system requirements. If you already redeemed a product key, you're simply reinstalling the apps, or you know you have an assigned license through work or school, you can skip ahead and go to the section sign in to download and install Microsoft 365 or Office.

Install Microsoft 365 2019 or 2016 on a PC. Remember a one-time purchase version of Microsoft 365 is licensed for one install only. Depending on your browser, select Open file (in Edge or Internet Explorer), Setup (in Chrome), or Save File (in Firefox).

Select Start > Settings > Time & language > Language & region. Open Language settings. Go to Preferred languages, select Add a language. In Choose a language to install, enter and select the name of the language that you want to install, then select Next. In Install language features, select the features that you want to use, then select Install.

This update contains both security and non-security fixes. See the release notes for details on updated packages. .NET 6.0 servicing updates are upgrades. The latest servicing update for 6.0 will remove the previous 6.0 update upon successful installation. For example, when .NET 6.0.29 is installed .NET 6.0.28 version will be removed from the ...

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

The enablement package is a great option for installing a scoped feature update like Windows 10, version 20H2 as it enables an update from version 2004 to version 20H2 with a single restart, reducing update downtime. This enables devices to take advantage of new features now.

The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows 7 and Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component.

Run Windows Update a few times. Download and install any available updates in Windows Update, including software updates, hardware updates, and some third-party drivers. Use the Windows Update Troubleshooter to fix Windows 11 Update errors. Check third-party drivers and download any updates.

Find the software, and then select Product key/Install. Note: If you're having problems installing an app from the Microsoft Store, see Fix problems with apps from Microsoft Store. If you're looking for download and installation instructions for a specific product, see the following sections.

Click one of the recovery options below and follow the steps to try to get things working again. Remove an installed Windows update. Reset your PC. Use the Startup Repair function. Use installation media to reinstall Windows 11. Use installation media to restore your PC. Use a recovery drive to restore or recover your PC.