
You will probably get a lot of opinions one way or another, but keep in mind going with the one with the most "votes" doesn't mean it's the best one for you. In saying all of this, as I mentioned above, try both of them out for a few weeks each and decide for yourself. I can run all my games maxed out without any issues. Personally I would suggest WD, I use it on my gaming system and I haven't noticed any impact on gaming performance when using it. Furthermore it's built in to W10, never expires, pretty much guaranteed to work with every major release of W10 and usually has the least conflicts with other programs, at least in my experience. Aside from that, you don't even notice it. On the performance side of things, WD is for the most part not very noticeable, however, if you are installing/uninstalling and or transferring large files very frequently, it tends to have an impact on the system during these tasks, due to the way it scans. You have to make the changes either via Registry, Powershell or Group Policy Editor, which can be a little confusing and time consuming, however, there is a solution, it's called Configure Defender! :emoji_clap: Its a tiny program created by Ful, who is a member here and basically he created a GUI to make these changes very quickly with just a few mouse clicks. There are some additional settings that you can tweak to make it stronger, but it's not very user friendly when it comes to making these changes. WD is free, no ad's, not in your face and protection wise has come along ways. Again, this is my opinion, but protection wise it's a fairly capable product.


Performance wise, it seems to be fairly light on the system. While it's free you will be subjected to ad's, but apparently you can stop that by blocking a process within Windows firewall. They have been caught numerous times doing questionable things when it comes to data mining and leaving some processes on your system after you uninstall it.


Personally while Avast is pretty good on the protection front, I am not a huge fan of the company anymore. Both are great, so I would give them both a try and see which one you like most.
