SymptomsYou have decided to upgrade your Parallels Desktop 2 or 3 to Parallels Desktop 6 or 7 for Mac.
ResolutionAs a first step, we strongly recommend that you read this article to learn how to get a special license for Parallels Desktop 6 or 7 for Mac when upgrading from version 2 or 3.
Then, please follow these steps:
1. Make a backup of your virtual machine. Your virtual machine files are located in your Home folder/ Documents/ Parallels/ VM folder by default (it also might be in your Home folder/ Library/ Parallels/ VMfolder, if the virtual machine was created under build 1970 or earlier). To backup your virtual machine, please copy this VM folder to a safe place or external hard drive.
2. Start your virtual machine and go to Start --> Control Panel -->Add or Remove Programs and remove Parallels Tools.
NOTE: We recommend that you uninstall your current anti-virus protection temporarily;you can re-install it as soon as the upgrade is completed.
3. Download and install Parallels Desktop 6 or 7 for Mac.
4. Start your virtual machine and wait for it to convert to the new format.