Windows Defender is an excellent antivirus and antispyware. On my machine, I use it and Malwarebytes Premium. I also try to use common sense as to where I visit, and what I open. Advanced Threat Detection was added to Defender ( MS ) as a voluntary service. It was originally part of Enterprise solutions. I opted to add it to my system. I've had to remove it, since I didn't want to roll back the update and wait hopefully for a bug fix which would break something else. "Microsoft Defender AT...