I have been kicking the idea of upgrading to Win7, but can't get a handle as to what I need to buy. I miss the old days. One box for all your needs. Now I don't know if I need OEM, retail, upgrade, family pack . A little background. I have three systems A,B, and C. I want to put Win7 Home prem. 64bit on all. System A is a desktop running 32bit XP home. System B is a laptop running 32bit Vista. System C is a laptop running 32bit Win7 home prem. Is there one Windows product that will satisfy my needs? Thank you for your help.