If there is no item stuck in the blades of the disposal obtain the Allen wrench that should be attached to your disposal or that came with it. There is a breaker socket located on the bottom of most disposal brands. Place the Allen wrench in the breaker socket and turn it back and forth. By doing this you may be able to unlock the source of the problem. Just be certain that the disposal is not turned on when doing this.
Two Aberdeen restaurateurs, Ciro Schiattarella and Michele Siciliano, were extradited to Italy for their part in the "Aberdeen Camorra". A fourth Scottish associate made history by becoming the first foreign member of the Camorra and is currently serving a jail sentence in the UK. It has been reported that he also receives a monthly salary, legal assistance and protection.
Some folks knocked the instructions. Take heart. It appears that the Waste King guys have heard the criticisms from the negative reviewers. I am guessing that they have been re-written to better explain the installation because they are really easy to follow. My best advice is this: don't be afraid of a difficult or confounding set of installation instructions. It is really easy. Here's what you do. Go to youtube.com and search for a video on How To Remove Your Existing Garbage Disposal because this is the hardest part. You will find one that matches yours. Watch it. I started removing the Badger incorrectly, stopped, watched a video, and then it was a piece of cake. In my case, I shouldn't have removed the three long screws before removing the body of the old one. You do it after it is disconnected. READ the instruction manual carefully. Then go ahead and youtube the Waste King installation video. It is very easy once you see it done. No filing or grinding gaskets, and Good Lord, no car jacks under your sink please. If it is hard then you are doing something wrong. STOP!!! Review the procedure. Start again. The directions are actually very explicit. The parts are well labeled. The diagrams show you what to do. The videos show you what to do. If you prepare yourself (15 minutes of reading and watching videos, tops) you will fly though the installation and be a happy person.