Can I add a postscript to my original question? I downloaded v5608 and 15 days later received an email saying that my trial period had expired. Now when I try to start Parallels, I receive an error message saying "Parallels Desktop is unable to attach to the network adapter unknown. If this is the first time you see this message, please reboot your computer and start your virtual machine again. Otherwise please check your virtual machine's configuration and select another network adapter, or you will not be able to work with network connections inside your virtual machine." Does this mean that I downloaded the wrong version or is there now something else wrong? TIA again for your help, John