The product key says
"Win Vista HmPrm - Win 7 HmPrm UPG Fulfill"
I'll read the EULA after lunch...
Blimey, working out which license applies is tricky...
F:\sources\license\_default\_default\homepremium says nothing unusual, e.g.
UPGRADES. To use upgrade software, you must first be licensed for the software that is eligible for the upgrade. Upon upgrade, this agreement takes the place of the agreement for the software you upgraded from. After you upgrade, you may no longer use the software you upgraded from.
I wonder if I'm looking at the correct license?