VMWare vs MS - would use vmware. I installed the MS product on a new PC - then renamed the PC. Couldnt get it to work, had to uninstall eventually, then find docs on how to REALLY uninstall it and reinstall. VMWare coped with no major issues, with the PC rename. Windows 2008 server hiccups a bit in a vmware session, but runs ok, the odd error that vista drivers arent supported properly. As soon as I got proper product cds - rather than having to use pre-prepared m$ virtual machines, I stopped using the ms product and have only used the vmware server.