try this put 8EC2 in the file search box to find the file.
I had this problem few years back this got it working again.
if this does not get it going then we really going to have to dig about.
this came from Mike.
This problem can occur from time to time. To solve it go to c:\program files\installshield installation information. You will probably see a large list of folders in here all with very long names. There will likely be two folders for Dark Physics {8EC28FBE-59C4-4FBC-B707-F8FDAE3CCAEE} and {76431DB7-7827-4BA3-98B6-C686AAD21868}. To confirm these are the correct ones go into each of these folders and open Setup.ini. There will be a listing for AppName. Ensure it contains the keywords Dark Physics. If it does then delete both of these folders.
Now go to the directory where DB Pro is installed and then into the Compiler folder and finally plugins-licensed. In here delete DarkPhysics.dll, NxCharacter.dll, NxCooking.dll, NxExtensions.dll and PhysXLoader.dll. These are the core files for Dark Physics.
Next download the latest version of Nvidia Dark Physics and install this. Also grab the latest drivers install those.
When finished you should be able to run Dark Physics and continue working with it.
Dark Physics makes any hot drink go cold.