Thanks for the reply. My DEP was already set to "enable for essential Windows procs only", but I changed it to be on for all applications except for the ones I specify, and added APGame.exe to those. I also uninstalled NVidia drivers and NVidia PhysX before rebooting my PC.
On startup, I was asked to install drivers for my coprocessor (don't even know what that is) for the first time. Then I tried to launch the game, but it crashed (twice?) with these to entries showing in event manager:
Faulting application APGame.exe, version 1.0.0.0, time stamp 0x4bd8888d, faulting module kernel32.dll, version 6.0.6002.18005, time stamp 0x49e038c0, exception code 0xc06d007e, fault offset 0x0001e124, process id 0xd0c, application start time 0x01cb04265c826f1a.
Faulting application APGame.exe, version 1.0.0.0, time stamp 0x4bd8888d, faulting module APGame.exe, version 1.0.0.0, time stamp 0x4bd8888d, exception code 0xc0000005, fault offset 0x009be986, process id 0xd0c, application start time 0x01cb04265c826f1a.
I then reverted the DEP setting to the ones I had before (enabled for essential processes only) and rebooted. Still got the weird coprocessor driver prompt, and the game still crashed with the same event manager entries.