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.

Make sure to remove all other security programs that are installed on the computer before you install MSE. This includes any free or trial products that were pre-installed when you bought the computer, even if they were never activated.

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.

There are different ways to remove apps and programs, so if you can't find the one you're looking for, you can try another location. Note that some apps and programs are built into Windows and can't be uninstalled. You can try to repair a program first, if it's just not running correctly.

The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs. It also fixes corrupted registry keys.

Microsoft Defender Antivirus is free and is included in Windows, always on and always working to protect your PC against malware. Hackers and scammers sometimes use fake antimalware software to trick you into installing viruses or malware on your computer.

It includes features such as Microsoft Defender Antivirus, Windows Firewall, and Smart App Control, which work together to provide real-time protection against viruses, malware, and other security threats.

Troubleshoots and fixes common issues with security and malware prevention in Windows.

Microsoft Defender is free anti-malware software included with Windows if you have a Microsoft 365 Personal, Family, or Premium subscription. It's kept updated automatically through Windows Update. There are also anti-malware products made by other companies that you can choose from.

This article contains information about how the tool differs from an antivirus or antimalware product, how you can download and run the tool, what occurs when the tool finds malware, and tool release information.