Are Windows 10's Default Firewall/AV Really Good Enough?

I've been having trouble getting a good AV/security suite to work with Sandboxie on my laptop. I recently upgraded to Windows 10 and it's causing a bit of a conflict.

I live and die by my sandbox, as I never load up the internet without it. But I always like to keep a good AV running in real-time as well as a strong firewall. When we couldn't find one that is compatible, one of the mods suggested I simply stick with the default Windows Defender and standard Windows firewall (saying it can cause more trouble than it's worth trying to use a 3rd party).

Is this really true? If I always run Internet Explore sandboxed, so am I really safe enough just running the Windows 10 version of the default, packed-in AV/firewall? That seems kinda crazy to me.

Thanks!

 

Whether Windows Defender and Firewall are good enough is debatable. It all comes down to what you are doing on the internet. If you want an in-depth comparison of AV software, head over to AV-Comparatives.
http://www.av-comparatives.org/

And here's a list of 18 free Antivirus programs.
http://freebies.about.com/od/computerfreebies/tp/best-free-antivirus.htm