DLL Archive will clean up your system by getting rid of unused DLLs.
AnalogX DLL Archive is super-simple to use, just click search and let it do it´s thing - once done, you´ll be presented with a list of all the DLL´s that don´t have references in the system! Then just select which ones you think aren´t necessary anymore and archive them; it´s that simple! Make a mistake? No problem, restoring DLL´s from the archive is just as simple - nothing is deleted until YOU delete it.