I'm building a new Windows 7 64bit machine today & have ordered a Windows 7 Professional 64-Bit OEM Full installation DVD Disk which will take about a week to arrive.
My question: I have a Windows 7 64bit Ultimate OEM install disk and was wondering if I could use that to install Windows 7 on my new build today ... and then input the Win 7 Professional key & activate it once it arrives in the mail?
Would that effectively "downgrade" the Ultimate install to the desired legal "Professional" install?
No. However, following this instructions: »www.neowin.net/news/make ··· ith-ease will allow you to make a disc that lets you pick the version to install.
Oddly enough, to get the same capability with a Win 8 DVD, you put the ei.cfg file back in.