Security Focus.

I was wondering how one can fight system crashes and security attacks because of getting online using windows? It was then I got this crazy idea. Microsoft has a product called virtual pc using which you can have any number of pc based operating systems on your machine. And now find a way to connect to internet only using one of the OSes installed inside the virtual pc. This implies you will not be able to access the internet on the main windows OS. This makes your data and system on the main OS safe and secure. Virtually its the same as if you are accessing the net from a secure sandbox. The whole concept should work well or atleast give a tough time to hackers. Who knows you never know something works until somebody finds a way to break this virtual barrier too.