I never use Window Vista before,
But, i am quite confident to use Window 7,
It is better than Window Xp & Window Vista,
System Requirement for Window 7:
Intel Pentium 4 or AMD Proccessor,
512MB of RAM and above,
1 GB of available hard disk space,
Currently, i am using Window Xp,
I can't wait to format my Laptop,
And, some engineering application not adapted to the Window 7,
So, i downloaded Virtual PC 2007 software (free),
It works perfectly.
"Virtual PC 2007 settings"
"Win Xp with Win 7"
You can online at both window.
What is the good points of Virtual PC,
You not need to install any driver e.g. Ethernet card & etc.
But, i suggest to have 2G RAM for a shared window.
Make sure that all windows are original!
You can download Virtual PC 2007 at Here
Select 32bit/per setup if your computer is old.
Same to Window 7.