That's not entirely true. In some cases the "Old Hardware" is not compatible with Windows 7. My Dell Dimension 3000 doesn't fully support Windows 7 because of Hardware incompatability. You can force it but it runs the machine like a dog and no real graphics support either. No drivers for graphics for the motherboard. You have to trick it with an old driver in compatability mode. And even then you can't use al of the features of windows 7.