broken bootcamp partition please help!

[Matthew Campbell]

Hey list. I really need Somme help. My boot camp partition won't let  
me boot in to it. I can select it when I hold down the option key and  
it'll sit there for a long time and ten jaws will come up and say that  
it's ready but there isn't' a log in screen. I worked fine yesterday.  
I tried to install the boot-camp update and it stopped after saying 81  
percent so I told it to stop and then I rebooted back in to the better  
half of my machine lol. Can someone please help? Thanks