i was going to say if you want me to take a look when you come home i can, but not much i can do remotely if you cant log in lol.
Im assuming you've used this before and it's not a clean install? Any major changes to the system?
If you can log in, i'd recommend doing a system restore Start > type System Restore. And then trying the updates in batches the next time. Again though, if you cant log in, not much use.
I'll let you knwo if i think of anything else.