The above information, got me on the correct line of thinking. I did what FloydA recommended, but it apparently did not make a difference. Then I set about looking for the "lost Machine". Your Virtual Machine's operating system's location has been moved or renamed, or through a change of USER Names on your Mac, the location has been forgotten. To get the Virtual Machine up and running again, you will need to find the location of the previously installed Windows Operating system (or whatever operating system is that you are tyring to open), and then click on it. If you would like to avoid having to hunt for the place the operating system was moved to (or forgotten about), you will want to "share" the file. NOW FOR THE likely location of this file. It's very likely that the file is located under, USERS / SHARED / PARALLELS / Windows. That's where you can go to find and click on "Windows.pvm" or whatever system you have installed. The folder you will want to "share" is the "Shared" folder. ( I know that sounds funny, but if you have updated users on your mac, or the location of this virtual machine has been lost, it seems it may be do to the "Shared" folder, not actaully being shared. To "Share" this folder, right click on it and select "Get Info", you should then see a little box that you can check for "Shared Folder". BAMM, there you go! Hope it works!