Check if you are using third party repositories. If so disable them, since they are a common source of problems. Furthermore run the following command in a Terminal: apt-get install -f
Thoir sùil a bheil thu a' cleachdadh ionadan-tasgaidh le treas-phàrtaidhean. Ma tha, cuir à comas iad oir bidh iad ag adhbharachadh duilgheadasa gu tric. A bharrachd air sin, ruith an àithne a leanas san tèirmineal: apt-get install -f