Microsoft .NET Framework 4.8.1 is a highly compatible and in-place update to .NET Framework 4.8. It includes native support for the Arm64 architecture (Windows 11+), accessibility improvements as well as other improvements.

Learn how to reinstall Windows on your PC and how activation works after it's installed.

Get help with signing in, changing passwords, creating and sending mail, deleting mail, creating folders, and more in Outlook on the web.

Learn how to use antivirus protection in Windows Security to protect your Windows PC against malware, viruses, and other threats.

Follow these steps to temporarily turn off Defender antivirus protection in Windows Security. Keep in mind that if you do, your device may be vulnerable to threats.

Get to know your way around Windows 11, from where to search to how to stay organized. Watch the video and read tips about new features.

Contact Microsoft Support. What's new. Surface Pro; Surface Laptop; Surface Laptop Studio 2

Learn how to get Microsoft Store updates for your apps and games. Download the latest versions of Microsoft Store apps and games.

If you are having trouble with your microphone features, the following information can help you troubleshoot and resolve issues.

Learn how to install Office 2013 on your PC or Office for Mac 2011.