Uninstallation of the Parallels Workstation does not delete any files that have been created using Parallels Workstation, such as configuration files, virtual hard disks, CD disk .iso images, floppy .fdd images, and serial/parallel port output files.
To uninstall Parallels Workstation in Windows host OS:
Note: You must have Power User rights to be able to uninstall the Parallels Workstation on a computer running Windows. Logging in without Power User rights and trying to remove Parallels Workstation will fail.
Do you want to completely remove the selected application and all of its features?", click Yes. You have license information of the Parallels Workstation stored in the Windows registry. Setup can save it for the future use, or remove it completely. It is recommended to keep the license if you plan to install the product again. Do you want to keep license?" If you choose to save it, you will not be asked to enter a registration key next time you install Parallels Workstation.