Since Ubuntu 12.04 Precise, it keeps popping up an error says “Ubuntu has experienced an internal error” when something goes wrong.
Here’s the quick tip to turn off Apport Error Reporting in Ubuntu 12.10.
Hit Ctrl+Alt+T, copy and paste this command into terminal and run to edit /etc/default/apport:
sudo gedit /etc/default/apport
Change the value to 0 and save the file to disable it.