I bought both Parallels for Mac and Parallels Workstation for Windows/Linux. I understand that the keys are more or less a one shot deal. Pick a machine and you have used the key. So I want to use the temp keys to play around before deciding to use my paid for Windows/Linux key. I am a disabled Veteran and I don't have the money to buy a large number of keys. I have bought two. The problim is that I can only get expired temp keys. For the Mac that was no problim. I used its key right away. For Linux/Windows, I have several old computers laying around that I play with. Please, is there a way to get new valid temp keys. I'm not trying to cheat the system. If I decide to run on more than one computer after a trial period, I'll pay for the extra key(s) Sam