Yes, Windows Defender is compatible with most versions of Windows. Windows Defender was first released as part of Windows XP and has since been included with all subsequent versions of the operating system up to Windows 10.
Windows Defender is a security suite that helps protect your computer from malicious software, such as viruses, spyware, and other online threats. It works by monitoring and analyzing the activities that are happening on your computer, and then taking action when necessary to remove, quarantine, or otherwise neutralize any potential threats.
On Windows 8, Windows 8.1, and Windows 10, Windows Defender is the default antivirus solution that is built into the operating system. It’s a comprehensive security suite that provides real-time protection from the latest threats, and includes features such as malware scanning, browser protection, network inspection, and application hardening.
For Windows 7, Windows Vista, and Windows XP, Windows Defender can still be used to provide basic levels of protection. However, Microsoft recommends that users of these older versions of Windows upgrade to a more robust third-party antivirus solution for maximum protection.
Overall, Windows Defender is compatible with all versions of Windows, though it is best suited for the newer versions of the operating system such as Windows 8, 8.1 and 10. For users of earlier versions of Windows, a third-party antivirus solution should be considered for maximum protection.