Error msg everytime i try to install new software

[jwwin]

Ok trying again - I thank you Goldfinger for that extremely informative reply on how to use Synaptic package Installer with a great screen shot. I tried it and it blew up also. Will try to send you a screen shot of that, First I'm going to try to send a screen shot of the original error message pertaining to Package Installer. Although after trying Synaptic Package Installer and getting a system error msg I'm beginning to think I've got a corrupt copy of Linux Lite. I'm semi  computer literate and these error messages indicate a deeper system issue. But I shall attempt to send Screen shots for you both.   Well if I've read the instructions correctly you, Valtam should see a screen shot of my desktop with the original error msg that started it all. Next - Goldfinger I shall attempt to send you a screen shot of the second error msg which makes me susopect I've a corrupt copy of Linux  lite but you are the experts maybe I'm just missing something. Here is second screen shot: . Thats it let me know what you think. And thanks for your help it is appreciated.