I removed gnome-screensaver to install xscreensaver, but for some reason, it failed to run gnome-shell. I ran It manually but it failed. I also do sudo dpkg but no work. Before that, I installed kingsoft-office but when I install it, it took too much time to respond so I cancelled it and shutdown the computer by unplug the power cable. But, I went to the recovery mode ,turn on the network , and ran sudo apt-get install gnome-screensaver, it says
The package kingsoft-office needs to be reinstalled, but I can't find an archive for it.
I also ran software-center but it crashed.