Here is the error hope i can get some help, i show you the update manager and the line of the error, if you need something else just ask for it.
update manager error prompt:
An unresolvable problem occurred while initializing the package information.
Please report this bug against the 'update-manager' package and include the following error message:
'E:Malformed line 58 in source list /etc/apt/sources.list (dist parse), E:The list of sources could not be read., E:The package lists or status file could not be parsed or opened.'
================================================================================
error line:
deb http:mx.archive.ubuntu.com/ubuntu/ precise-updates main restricted
