There was a patch that I downloaded, hoping to get this software's full version for free. The patch worked though, but the thing is, Windows Defender didn't do anything, such as warning me that I am using a variant, trojan or something that is malicious or not good for my PC.
Used the same patch again, this time using ESET NOD 32. Can you believe it? I got warned like 20 times, and it kept cleaning the PC for 5 consecutive minutes.
So using only Windows Defender is not enough. I personally think using security software from Microsoft is lame.