It seems you may have some device that does not play well with Win 7. Can you disconnect any nonessential devices and try again?
There may be some other files you can check for problems, so check this Link Removed. It may be a long file but the error will probably be near the bottom with some type of "Failed" message.
Do you have the option during boot to hit F8 and boot into safe mode?
Some posts seem to indicate it is related to a partition. How did you format the Win 7 partition?