Fix broken Packages first
 

Have tried to install this package Vlc-plugin-libde265 from Synaptic, but it is throwing the below error when applying changes

Could not apply changes
Fix broken packages first.

Please help

I just notice, that Synaptic is still installed on my system. :confused:
There is a menu-bar on top and a menu “Edit” should be visible. Therein, try the command “Fix Broken Packages”.

Tell me what it does, so I can finally uninstall Synaptic!

TIA.

Tried Fix from Synaptics menu. Got Errors
 

Below is the message i got

E: Unable to correct problems, you have held broken packages.
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
E: Unable to correct dependencies
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
E: Unable to correct dependencies

Can you, from the custom filter menu, access to a list of broken or defective packages?
There is a button labeled “Custom Filters” in the lower left corner of the synaptic window. The choices are at display above.

Also, try to update the package list prior taking any further action (by hitting the “Reload” button.

I have to tell you that I do not like Synaptic and recommend the command-line tools for package-management. You should have aptitude or apt-get.

BTW. Which linux-distribution are you running?

Somewhere on the Synaptic menu, I forget exactly where, there's an item to "Fix Broken Packages."

Or you could run, as root,

My Linux Version details
 

command : uname - a

Linux SAM-Notebook 3.11.4-031104-generic #201310081221 SMP Tue Oct 8 16:30:11 UTC 2013 i686 i686 i686 GNU/Linux

kernel seems a bit old.
i also could not find the above mentioned package in my xubuntu vm's repos.

question:
what exactly are you trying to install? is it a package that is in ubuntus default repos?
is it a web downloaded .deb package?
or have you added ppa to your sources?
which version of ubuntu? is it up-to-date?

should be for Ubu-flavored OSs.

terminal>
output please.