virtualbox.org

After upgrading the CPU in my Linux Mint 14 system the following error message occurs when I attempt to open any of my VM's:

Failed to open a session for the virtual machine MS WinXP Home.

cpum#1: "CPU model" mismatch: host=0x17 saved=0xf [ver=14 pass=final] (VERR_SSM_LOAD_CPUID_MISMATCH).

Result Code: NS_ERROR_FAILURE (0x80004005)
Component: Console
Interface: IConsole {db7ab4ca-2a3f-4183-9243-c1208da92392}

Is there a resolution that avoids reinstalling?

Was/were the guest/s in saved mode instead of shut down?

All were saved.

Then you will need to discard the saved state before they will work.

Done! That did the trick, many thanks.

What is the best way to shut down a VM?

You shut the virtual guest down the same way you do on metal.