This is an extremely short guide to a major problem with Windows 7 using Virtualbox. Many users come to this site looking to find the answer – which is – Windows 7 Home Upgrade is sold in Europe and elsewhere as a full install version.

The problem is that installation via Virtualbox will complete but the user will not be able to ‘register’ their copy Windows 7.

The only way to install Windows 7 Upgrade using Virtualbox is to first install Windows XP and then run the Windows 7 Upgrade disc.