I know that MSE is build-in Windows 8.1, is it enough for windows 8.1? And if not, any recommended?
I have been using win 8.1 pro since it was released to MSDN subscribers.
These are all I use.....
1. Windows defender, aka MSE, as realtime protection.
2 Malwarebytes free edition as on-demand protection, which I run it once a week to make sure.
I have not had any security issues.
If one observes the "safe internet surfing " guidelines, the above 2 will be enough.
If one is careless, no AV will or can provide protection.
If you want 3rd party AV for realtime protection, that is your choice.
Just one thing, Avast free edition v8 is NOT compatible with Win 8.1. It works on Windows 8 but NOT win 8.1. I said that with first hand...