Ubuntu not starting properly

[Kenshin]

I updated my ubuntu last night, this morning i started it, it started all fine, when i opened one of my partitions, it hanged, so i restarted xserver, I logged in again and i got an error sayin nautilus cannot be used due to some error, so i restarted the computer.

after that i got the following errors , What to do?

*i36.tinypic.com/bdjx3o.jpg
*i34.tinypic.com/akxwxw.jpg

 

[mediator]

As it says run fsck!