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 XP to Windows 7), 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.