I have parallels 3.0 and don't really want to upgrade, but it is telling me to it can't find the driver and to restart the application. I was going to try to re-download 3.0 but cannot find a link anywhere. anyone know where I can find that?? also, a few other questions: 1) will 3.0 not run windows 7?? 2) if I use the trial of 5.0, install windows, and do not decide to buy after the trial, will my windows key be void and no longer work on something else (say 3.0 or bootcamp??) since it's a one-computer license?? thanks!