Yesterday I decided to update my system from 10.04 LTS to 12.04 LTS.
I downloaded desktop ubuntu for i386 .iso and made a liveUSB(using UNetbootin). I choose Try Ubuntu without installing and there I run install and choosed Update Ubuntu from 10.04 to 12.04. And at the begining of the update system just stucked and I made reboot.
And now GRUB looks like this 
And when I try to choose ubuntu instead of loading it there appers messages like

I tried to check and fix partitions using GParted from LiveUSB and treid use sudo fsck.ext4 -f /dev/partition_on_disk. But all thing still the same. What else can help? Also I tried update GRUB but nothing changed too