FYI: This is for installing an OEM copy of Windows Home Server over a 120 day evaluation copy. Don’t
use the OEM pre-installation disk. Boot from the OEM install disk. When
prompted for type of install pick the re-install. When you came to the product
key prompt don’t enter the product key and click next. Once the installation is
finished you will have 30 days enter you product key and activate.
The reasson I am posting this is that I never came across this issue where the product key was invalid during the install.