interrupted nautilus

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http://askubuntu.com – i ordered many softwares from ubuntu center then the electricity goes down and when i relaunch my laptop the problem was with Dropbox or nautilus as it wrote i tried gsku nautilus and i deleted all files in /var/lib/dpkg/updates and when i try to install or remove or update any software it doesnt allow me it says i have to go to terminal and typesudo apt-get install -f when i applied it says dpkg is interrupted i tried sudo dpkg --configure -a it reach 100% ant stuck about an hour is there any solutions (HowTos)