Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance.

Learn how to download files from the web, change your default download location, and find files you've downloaded on your PC using Internet Explorer.

MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

Learn how to change Windows display language and keyboard/input layout settings. These settings affect the language displayed in Windows, in apps, and at websites.

Find help and how-to articles for Windows operating systems. Get support for Windows and learn about installation, updates, privacy, security and more.

Here are a few different ways to find help for Windows. Search for help - Enter a question or keywords in the search box on the taskbar to find apps, files, settings, and get help from the web.

Microsoft now combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). SSUs improve the reliability of the update process to mitigate potential issues while installing updates.

This article describes how to permanently remove the contents of the Temporary Internet Files folder from your computer. Watch a video about how to delete the contents of the Temporary Internet Files folder yourself. Follow these steps according to your version of Windows.

Learn how to download, install, and configure additional language packs for your version of Windows.

Learn how to search for and open files from your Microsoft Office app. Browse recently opened files and folders using shortcuts.