I can't open Software Center, I have ubuntu 12.04 LTS, intel proccessor 64 bit. The error on the right end screen says 'Error: opening the catche (E: Encountered a section with no package: header, E problem with mergeList/var/lib/apt/lists/extras.ubuntu.com_ubunt_dists_precise_main_binary_ i386_packages,E: THe package lists or status file could not be parsed or opened). This usually means that your installed packages have unmet dependencies.When I click on software center it tries to open and the shut down. I got the computer with ubuntu one already installed in it few weeks ago. Initially the software center worked. Downloaded VLC, Skype and Google Chromium. After that it stoped working. I have no background in ubuntu or in progreming. I had to search what terminal means and how to open it. I appreciate any help with instructin to a very new beginner.