OK, looks like a croaked phone. Last ditch effort. If you go over to the forums at http://www.sevenforums.com/
have a good search for that error 43 code, there might be an answer that I've missed. We could also have a good look at the windows error logs, but I don't hold much hope as you have proven the PC hardware works, and you have checked and cross checked the drivers. All the error logs will show is an expanded view of the error.
I would consider returning the device with a view to a new replacement. Sorry. :(