Ed, I think you are right. MS Win XP Pro is manageable, if companies and people DO manage it right. And there are several ways to do it, depending on who you are, but lots do not do it in an organized manner. If MS botches the next release, though, there may be a lot of customers who drop out of the upgrade cycle and that could impact SolidWorks. So the OS will impact SWks. I doubt MS will flop on VISTA, but they are going to have to make a danged good compelling case to get a lot of shops to upgrade, if what I hear is true. Lots of skeptics out there right now who say "Show me." Stability so that work can get done reliably is imperitive. I hope SolidWorks makes the right choices. Bo