Windows Secure Boot certificate expiration 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. For details and ...

How to get this update Before you install this update Microsoft combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions. Install this update To install this update, use one of the following Windows and ...

File information A list of the files that are included in this update are provided in a CSV (Comma delimited) (*.csv) file. The file can be opened in a text editor such as Notepad or in Microsoft Excel. Download the file information for this cumulative update KB5071544 now. Download the file information for the SSU (KB5070248) - version 17763.8020 update now.

To get support in Outlook.com, click here or select Help on the menu bar and enter your query. If the self-help doesn't solve your problem, scroll down to Still need help? and select Yes. To contact us in Outlook.com, you'll need to sign in. If you can't sign in, click here. For other help with your Microsoft account and subscriptions, visit Account & Billing Help. To get help and troubleshoot ...

Check the Xbox services, games, and apps for any service outages.

You can install the web version of Outlook—either Outlook on the web or Outlook.com—as a progressive web app in the new Microsoft Edge and Google Chrome. When you ...

Learn how to sign into your PC with Windows Hello using a PIN, facial recognition, or fingerprint.

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Contact groups, or distribution lists, are a fast way to send a message to multiple email recipients, especially groups you repeatedly contact.

Learn how to switch out of S mode to install apps from outside of the Microsoft Store or to upgrade to Windows 11.