I purchased a used development PC with Ultimate 7 MSDN version on it. I own a laptop with Ultimate 7 full, installed over XP. I also own a 3 user Home 7 with only one install (2 left). Yes, it's messy. I also own unused copies of XP (2 or 3, not new, but not installed on anything at this time).
So, I think I'm legal to buy an Ultimate 7 Upgrade, or an Ultimate 7 Anytime Upgrade!
The Anytime Upgrade is cheapest!
Can I purchase an Anytime 7 Upgrade, and just enter the new key to turn the MSDN into a personal Ultimate 7?
Gee, I hope you can follow that!