To find out if an app or program is installed in Windows, select Start > Settings > Apps.

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.

Describes the new and improved features of Microsoft Windows Installer 4.5. The article also discusses the issues that are addressed from earlier versions of Windows Installer.

Real-time protection is a feature in the Windows Security app that continuously monitors your device for potential threats such as viruses, malware, and spyware. This feature ensures that your device is actively protected by scanning files and programs as they are accessed or executed.

Alternatively, if installation doesn't start automatically, browse the disc to find the program setup file, usually called Setup.exe or Install.exe. Open the file to start installation.

Learn what file name extensions are, which extensions are common in Windows, and how to view them in File Explorer.

Solve problems with detecting and removing malware with Windows Security, including incomplete scans, detection errors, and persistent malware.

Learn about Windows RE, how to access it, and the different tools it offers.

Learn how to create installation media for installing or reinstalling Windows.

To uninstall unwanted antimalware software: Go to Start > Settings > Apps. Find the unwanted app or apps and select it. Select Uninstall.