I haven't really used a Windows computer much* in the past 10 years but now have a Surface Pro 3 and thought I might end up using it on trips when I want a tablet with me.  My hope is that I can successfully install Ubuntu on it in the future and maybe someone can figure out how to get the Type Keyboard working with Ubuntu. For now, I'll probably be sticking to Windows so I need software advice.    What is the best/fastest/least buggy...   1) Virus Scan (I assume I will need one of these).