Windows Installer Error - "Can't find feature on network"

"The feature you are trying to use is on a network resource that is unavailable"
This is a quite annoying error, as it makes un-installation of certain applications seemingly impossible, but there is a quick solution with the help of the windows registry editor:

START / RUN / regedit (right click and Run As Administrator for Vista/7/8)
find the following location and right click on it:
HKEY_CLASSES_ROOT/Installer/Products
from the drop down menu choose Export and save the current state of this registry key with a name like REGISTRY_BACKUP for example. This can help restoring the key if something should go wrong.

Now from the main menu choose Edit/Find and enter the name of the program which you are having trouble with, once it's located, right click on it and Delete.
Be careful not to delete something if it is out of the scope of HKEY_CLASSES_ROOT/Installer/Products!