Looks like the computer is having trouble loading the installation/setup program.

Did you remove the Zune folder (in the Programs folder within your HD) and anything that was left behind after you uninstalled the first version?

I don't think its the Zune. If you've monkeyed with the registry, you could have accidentally changed something there. Go back and double check yourself.

lpxxfaintxx - does that program also remove the information from the registry? It could be something in the registry that is causing the installation/setup program from functioning.