Avoiding viruses and malware

I am new to Windows 7 and have just come across the Vrtualization featuers. They seem interesting but I am not 100% sure of how they work.

There are certain apps out there in my industry that people suspect might not be "clean" but they are very good at what they do. So I want to be protected from them. I used to use Sandboxie with my Win XP setup.

If I install or run a virus/maleware infected application, can I do so in a Virtualized way so that it doesn't infect the rest of my system?

Thanks,

Jon

Internet Marketing. They supply a good tool and claim it is virus free, but it gives a "false positive" supposedly.