mr. ed wrote:
This is my first time using Windows Defender.
Just note that you've gone from high level AV protection, to one of the lowest rated. Take a look at security ratings for Windows Defender by AV-Test.org. Just make sure its their independent "public" comparison reviews. And not commissioned by any AV manufacturer.
Also, look at the ratings by AV-Comparatives.org. They're partially funded by government and non-profits.
There are a number of freely available AV packages available. If you want to find Windows Defender, look at the one(s) rated at the bottom of the list for protection.
Just note that Microsoft apparently never intended Defender to be the primary AV protection.