"Can I use a Windows 7 Upgrade version to perform a clean install of the OS?"
This is becoming particularly antsy for people because they want to take advantage of the time-limited Windows 7 presale, which starts tomorrow.
So, what the heck, I asked.
The answer, I'm told, is ... Yes. You can perform a clean install of Windows 7 with the Upgrade media, as you could with Windows Vista.