After you identify the security programs that are installed on the computer or have been partially removed from the computer, you can use a cleanup tool or instructions from the security program manufacturer to completely remove the program.

Follow these steps to automatically diagnose and repair Windows security problems by turning on UAC, DEP protection, Windows Firewall, and other Windows security options and features. Select the Download button on this page.

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. Insert the disc into your PC, and then follow the instructions on your screen. You might be asked for an admin password.

Stellen Sie sicher alle Sicherheitsprogramme entfernt, die auf dem Computer installiert sind, bevor Sie MSE installieren. Dies umfasst alle kostenlosen Produkte sowie, die vorinstalliert beim Kauf des Computers, auch wenn sie nicht aktiviert wurden.

Turn Windows Security on or off. When you get a new device and start up Windows 10 for the first time, the antivirus protection that comes installed with the device is your default security app. However, Windows Security is pre-installed and ready for you to use at any time.

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. Insert the disc into your PC, and then follow the instructions on your screen. You might be asked for an admin password.

This security update resolves several reported vulnerabilities in Internet Explorer. These vulnerabilities could allow remote code execution if a user views a specially crafted webpage in Internet Explorer. To learn more about the vulnerabilities, see Microsoft Security Bulletin MS15-124.

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

Learn how to access Windows device security settings in Windows Security to help protect your device from malicious software.

Windows Security Update. This update provides latest updates for Windows Security platform, which is comprised of the Windows Security app and its underlying service. To obtain the current version of Windows Security app, please run powershell command below: Get-AppPackage Microsoft.SecHealthUI.