Another program in Windows Technical Preview...

"Why this?" you ask. Because: it doesn't replace your anti-virus, it complements it. "How so?" you ask. By finding and blocking things your anti-virus doesn't see or doesn't recognize as potentially harmful. For example, it can not only block incoming malware, but it will show you a little window telling you the IP Address of that malware, so you can do a little research, and add its web address to your blocked list. And it doesn't conflict with your regular anti-virus, like Defender or Avast Internet Security. They get along OK together. So this helps to complete your coverage. Because an ounce of prevention is still worth a pound of cure.