norton is crap n its a sytem resource hog.
i dont think "virtualization" r for your average users. With the Sandboxie free version, at least when I tried it, you are limited to only one sandbox at a time and there is a splash screen after you have been using it for 30 days. It has benefits that many find useful. Sandboxie is great for surfing the "unknown territories" of internet (useful for amature web surfer). however u can still catch a virus if u run an app outside of the box.
For me personally, its more trouble than it was worth. But thats a personal choice.
Re-install doesnt prevent the same thing from happening.
u can go "MAC" but may still encounter virus (but chances r slim), but u will need to learn mac, which u may not want to do, unless you just wanna do the most basic.
Image backup will almost guarantee protection if you cannot clean the virus. heck, sometimes even if you can, it may be less time consuming to just re-image.