In my host Win 7 OS, I use MSE for real-time and Malwarebytes (free edition) for on-demand.
In Win 8, Windows Defender is MSE.
So, do I need another anti-virus program, or do I just install Malwarebytes free edition for on-demand ?
If I do need an AV, will Avast free edition be compatible with Win 8 ?
I do mean Avast free edition, not the paid version.