I am using Ubuntu 12.10, today update notification popped up and I updated the system, then it asked for restart, I was doing some stuff so I restarted after ~30 minutes, after restart, Ubuntu GUI was gone, there was no taskbar or unity, I fixed by entering this commands:

sudo apt-get install linux-source 

sudo apt-get install linux-headers-generic

sudo apt-get remove nvidia-current-updates

sudo apt-get install nvidia-current-updates

... these commands fixed almost everything, unity is running, but there's problem when I go in terminal ctrl+alt+F1, before I write anything, many many messages appear, it says "Buffer I/O error on device fd0, logical block 0", what should I do?

Here's image: http://i.imgur.com/JBD5x.jpg

Another thing I noticed is that after few about an hour, messages disappear, this error keeps showing up for first hour roughly.