The EULA, and even the readme that Tamar quoted says clearly that if you buy the upgrade, you must uninstall the version you're upgrading from before you can install the upgrade. You don't have to install the new version immediately, but ultimately ("within a resonable time"), you do have to do it.

You cannot have both on your system at the same time if one is an upgrade of the other.

If you buy the full version, then you may, and they will co-exist happily on the same machine.

Alan

>Okay, I admit to being very confused now, Tamar.
>
>The only real issue I have right now is which version I should buy (bearing in mind, I'm spending taxpayer money, not my own directly, so I can live with it either way. But I try to avoid excesses with taxpayer money - just as if it were my own money).
>
>But now I'm unsure what the heck to do. It almost seems like we will have to wait until the on-shelf phase, and find out here from someone who has actually quickly bought & tested the new version with regard to the EULA.
>
>Or, does someone know *for sure* what the upgrade version will do? Someone from MS or with good contacts there?