The file extension VMC is used for configuration files of the emulation software Windows Virtual PC. Windows Virtual PC lets you set up Windows 7 virtual machines (VMs) running Windows XP or 98, for example.
VMC files include settings in an XML-based format. The settings include, but are not limited to, the name of the VM, the amount of memory the VM will use, and the location of the disk file (extension vhd) where the operating system is installed.
Usually the VMC files with the vhd file (Virtual Hard Drive) are in the same folder. Windows Virtual PC is the successor of Virtual PC 2007 and is only available for Windows 7. However, Virtual PC 2007 also uses VMC files for configurations that may not be compatible.
Windows Virtual PC can create shortcuts (file extension vmcx) that point to a specific VMC file. Double-click on a vmcx file to start Windows Virtual PC directly with an assigned configuration. The emulation software VMWare can import a Virtual PC VM via the VMC file and convert it into a VMWare own format.
VMC files are also used by Virtual Server.