Did you tried to put hash (#) in front of line 54 then run update? Try following steps: [code]sudo gedit /etc/apt/sources.list[/code] save it, then run: [code]sudo apt-get update[/code] This should solve this problem, anyway this is not solution, rather workaround, It will be great if You will be able to paste here output from: [code]cat /etc/apt/sources.list[/code] Regards Richie