Remove Residual Config packages
Residual Config packages are usually dependency packages that are left behind after you uninstall a package from your machine.
- Go to System -> Administration -> Synaptic Package Manager.
- On the bottom left hand corner of the window, click the Status button.
- In the list above the Sections, Status, Search, and Custom buttons, you choose "Residual config".
- Select all packages (ctrl+A) and mark them for Complete removal. Then hit the
- Apply button