I have an older system with two HDs and on one is XP pro and on the other I want to test install Vista to see how it works with my various software and some of my existing hardware such as my cannon all in one printer and my dvd burner. My computer only has a barton athlon 3200+ cpu, 1gb of memory, older IDE HD, and a ATI all-in-wonder 9600 video card. The advisor says it will run Vista ok, but I am planning on building an all new system with a c2d processor, 2gb ram, much better video card and a LCD monitor. My question is: Is it legal, or possible to install it to run as a dual boot on my second HD now, not activate (just to learn and test) it and then in a couple of months when I have my new system built, wipe out my first installation on this and install it fresh and avtivate it. I don't want to wait until I get my new system built to try and learn and test it out. I read Microsoft lets you exend the test period up to 90 days without activation for testing purposes.