After beeing in discussing with the support for over 4 weeks now, I found my one solution. Post it here, though it might help: The common suggestion to use "ptrctl exec" did not work as the drive "Z:" was not available. For example prlctl exec <VM name> cmd /c dir Z: The solution I found is: prlexec --vm <your VM name> -r <windows .exe with path> <parameters> This works for command line utilities as well as for graphical applications. HTH others 42Bastian