Is Windows Defender enough?

Defender and most other free AVs are sufficient IF you keep all credit card numbers, bank account numbers, etc., off your computer. I switched to free AV ten years ago and have never had a problem.

But about 20 years ago, I had my numbers in a "secure" program, and Norton Security Suite started beeping. It was set to go off if my rig started broadcasting a series of numbers. It showed me that my computer had just sent out the first three numbers of my Social Security number, and asked if I wanted to continue. That was the end of all those account number savers for me.

Vince Massi said:

Defender and most other free AVs are sufficient IF you keep all credit card numbers, bank account numbers, etc., off your computer. I switched to free AV ten years ago and have never had a problem.

I never did keep such things on my computers, nor does it ever go through email.

My ESET Smart Security expires in a little over a month. I think I'll just let it go. I'm still considering what, if anything, I might use as some sort of anti-exploit to run along with Defender.

I've used windows defender and malewarebytes for 2 years, and I've never had any problems.