Yes, Windows Defender will be automatically turned on if you re-install Windows.
Windows Defender is a pre-installed security solution developed by Microsoft that helps protect users from malware, spyware, and malicious activities online. It is designed to detect, quarantine, and remove viruses, worms, Trojan horses, rootkits, and other malicious programs from a computer system.
Windows Defender first became available with the release of Windows XP and has been included in every version of Windows since then. It is enabled by default and can be used alongside or in place of third-party antivirus programs.
When you reinstall Windows, Windows Defender will be automatically turned on. You may receive a notification from Windows Defender that it is turned on and ready to help protect your PC. If it’s not already enabled, you can open the Control Panel and click on “Windows Defender” under “Security and Maintenance” to enable it.
Once turned on, Windows Defender will start performing regular scans of your computer and its files. It will look for any known malicious programs and suspicious activities. If it finds anything, it will quarantine or remove them. You can also customize Windows Defender to perform more specific scans or use the scan results to make changes to the security settings on your PC.
If you choose to use a third-party antivirus program, it may turn off Windows Defender. While Windows Defender is effective at helping protect your PC, it’s recommend that you use a more comprehensive security solution designed to protect against the latest threats.
In summary, Windows Defender will be automatically turned on when you reinstall Windows. It helps protect your PC from malware, spyware, and other malicious activities. You can customize Windows Defender to perform more specific scans or use the scan results to make changes to the security settings on your PC. If you choose to use a third-party antivirus program, it may turn off Windows Defender.