I have Windows 7 Home premium, I was told to run in XP mode you need Professional. I am not sure if in XP mode if it is a 64 bit or 32 bit mode. I am using Navision, it is an accounting program. I checked and an upgrade cost over 10 G's. Tried to load on 64 bit and wouldn't recognize. Did a dual boot with windows 7 32 bit, the software loaded but won't run. I want to keep Windows 7, but need the capability of running my accounting software while on the road. I am currently running the software on my XP 32 bit system at the office so I know that it will run with it.