Re: Suspected Registry Issue
I looked at the code you posted up, the only thing that could have gone wrong is a bad software install.
I thought about your problem, and I did have one similar to yours with xp sp2 and sp3.
I know you dont want to, but retry the installation again on 1gb usb drive and let windows xp install that way.
Keep note of what you reinstall and what xp updates, if you get it again and catch it, try to reverse the problem by getting rid of a certain update.