system crashed during update from 11.10 to 12.4 64 bits
i had to hard reset due to inactivity during the update, after rebooting, ubuntu started, but it doesn't let me to enter Terminal, it only react when i search something in unity, but it doesn't let me to access any window, nor Terminal nor update manager, nothing, it appears that the cursor is in the center of the screen (as it reacts as i press ctrl, but that's all, i've tried pressing ctrl+tab but doesn't work either, i can access to anything but unity btton searches).