Most of new released PC games nowaday use PhysX (see http://en.wikipedia.org/wiki/PhysX) to calculate objects' inter-actions.
Serveral months ago I installed Trine (see http://trine-thegame.com/) and found an error saying that it cannot load "physxloader.ddl" when running the game. I started a quick "google" and loaded "Nvidia PhysX driver". However I got "physyx installation ended prematurely ..." during installation. I gave up playing the game since I thought that my VGA card (Nvidia 6600) was not good enough.
A week ago I got another game called "Shadowgrounds : Survior". After installing the game, I got the same error (i.e. "physxloader.ddl") so I suspected that this was not becuase of my VGA card. I started to search over the internet about the issue "physyx installation ended prematurely ...". I tried many things but none of them worked.
Finally I got the workaround to install the driver. The driver needs to be installed in "quiet" m...
