Do you have admin privileges on your regualr account? What about in the new account where things worked?
Seems to me I've seen an article or two on how to transfer the HKEY_CURRENT_USER hive from one user to another. I would certainly back up the registry first, probably even image the machine in it's current state, becasue there is a lot that can go wrong with registry editing, and it can render the machine unbootable.
