By Shawn Brink Windows 10 version 1703 and later provides the latest antivirus protection with Windows Security, which contains Microsoft Defender Antivirus. When you start up Windows 10 for the first time, Microsoft Defender Antivirus is on and actively helping to protect your device by scanning for malware (malicious software), viruses, and security threats. Microsoft Defender Antivirus uses real-time protection Read More