Hmm. If I were to guess, here are some possibilities...
* You have the PhysX engine enabled in your NVIDIA control panel and don't have the actual PhysX engine installed (even though it comes with newer NVIDIA driver packages).
* You have a very outdated version of your video card/GPU driver installed. Grab the latest from your GPU manufacturer (ie: ATI, NVIDIA, or Intel).
* Your drivers and PhysX engine is installed, but you have corrupted files for the PhysX engine or it was accidentally deleted.
At any rate, reinstall the latest drivers for your video card/GPU.
If you're running an NVIDIA card, you can also test by disabling PhysX in your NVIDIA control panel.
Comments
* You have the PhysX engine enabled in your NVIDIA control panel and don't have the actual PhysX engine installed (even though it comes with newer NVIDIA driver packages).
* You have a very outdated version of your video card/GPU driver installed. Grab the latest from your GPU manufacturer (ie: ATI, NVIDIA, or Intel).
* Your drivers and PhysX engine is installed, but you have corrupted files for the PhysX engine or it was accidentally deleted.
At any rate, reinstall the latest drivers for your video card/GPU.
If you're running an NVIDIA card, you can also test by disabling PhysX in your NVIDIA control panel.
NVIDIA GeForce G100 195.62
As for the PhysX engine, I think its part of the driver but I don't know for sure. Looking in to it though.
Yup, for NVIDIA the PhysX engine should be part of the driver install package.