If you upgrade the guest operating system that is installed in a virtual machine, or if you specify the wrong operating system version when you create the virtual machine, you must change the guest operating system type that is configured for the virtual machine.

When you change the operating system type, the virtual machine configuration (.vmx) file changes. The guest operating system itself does not change. To upgrade the guest operating system, obtain the appropriate software from the operating system vendor.


Power off the virtual machine.


  1. Select the virtual machine and select Virtual Machine > Virtual Machine Settings.
  2. On the Options tab, select General.
  3. Select the new operating system and version.
  4. Click OK to save your changes.