PVM - Parallels Virtual Machine is a file extension that can be used with Parallels Desktop emulation software programs. They also consist of many contents of a hard drive as well as memory which can be used to load Windows operating systems. You can also mount PVM files as a hard drive a lot easier by simply right clicking on the file and selecting an option that states show package contents. You will be able to go online and take advantage of this file extension when you can so you can begin enjoying the benefits right away. You do need to make sure that you have the right PVM files in order to use the extension.