Set the Guest OS Type and Version

You can change which guest OS a virtual machine is configured to work with. You need to change it in the following cases:

• If you upgrade the guest operating system (for example, from Windows 8 to Windows 10), you need to change the guest OS type and version correspondingly or Parallels Tools may start working incorrectly.
• If you create a virtual machine without installing an operating system, and then decide to use it with a different operating system than the one you initially specified.

To set the guest OS type and version:

1. Shut down the virtual machine.
2. Open the Actions menu and choose Configure .
3. Click General and select an OS from the menu just above the Name field.