It was a new install. You have to tell Virtualbox which OS it is going to run, though I am not sure what it does differently. It seems you can change the settin

It was a new install. You have to tell Virtualbox which OS it is going to run, though I am not sure what it does differently. It seems you can change the setting afterwards. You may just have bad luck. It always takes me a day to get Virtualbox running correctly on a new PC, no matter how many times I have done it in the past.