You install Utilities and SDK for Subsystem for UNIX-based Applications (SUA) on a computer that is running Windows 7 or Windows Server 2008 R2. You run an application that uses portable operating system interface (POSIX) threads on the computer.

This article explains how to repair apps and programs in Windows 11 and use Settings to fix common app issues without reinstalling. You can repair some apps and programs if they're not running correctly. Note that you won't see repair, change, or modify options for all apps and programs. Repair options from the Settings page.

After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will still work, but we recommend moving to Windows 11. Learn more. Note: Use these steps for Windows programs.

Get security info and tips about threat prevention, detection, and troubleshooting. Including tech support scams, phishing, and malware.

Get Help has troubleshooters you can run for many common scenarios. These often help resolve issues without the need to contact support. If a troubleshooter is available for your issue, select Start to run that troubleshooter. After you run any troubleshooter, Get Help provides details on any findings and suggestions for possible remedies.

You install Utilities and SDK for Subsystem for UNIX-based Applications (SUA) on a computer that is running Windows Server 2008 or Windows Vista. You run a multithreaded application that uses portable operating system interface (POSIX) threads on the computer.

This article describes a problem with CD or DVD drives not work, or is missing, or not recognized after installing or uninstalling programs.

Learn how to reinstall Windows using Windows Update.

Microsoft Edge is a popular web browser developed by Microsoft. However, users may encounter issues while downloading, installing, or updating it. This article provides troubleshooting steps to help resolve these common problems.

Here are some things you can try to fix the problem. We've listed the most common solutions first, so try them in order. Wait a few minutes, restart your device, sign back in, and restart your app. How you get to the repair tool depends on your operating system. Select Start > Settings > Apps > Apps & features.