I have been having some serious problems with my computer mouse while playing games like Skyrim, LOTR: Conquest or Diablo III to name a few.
In games like TESV: Skyrim and LOTR: Conquest, every time I press the left mouse button my character either spins around 180 degrees (sometimes a little less) or ends up looking either upwards or most often straight down.
When it comes to games like Diablo III, my characters often ends up going in the wrong direction.
(all of this is seriously annoying for me...)

I have tried just about everything I can think of to fix it and my friends are out of ideas. Nobody can figure out why this is happening.
I have check so that my computer mouse do have the latest patch and the same goes for the rest of my computer, everything else is working fine.


Anyone that have a clue to what is happening to my computer mouse and what I should do to fix it.

Well I would always suggest taking it apart and looking inside. Maybe clean a few things.

It sounds like clicking the button is somehow making the mouse think that you've moved it. Possibly a short inside the mouse itself, or maybe just a software issue. Try removing all traces of whatever software your mouse uses and then installing the new drivers.

Also, have you tried any other mice (mouses)?