On my 64-bits Windows 7 system PhysX does not show up in the Control Panel.rarified wrote: How do you tell which version of PhysX installed? Open the Control Panel on Windows, select "Programs and Features" (from Win 7, other versions may have slightly different wording). That panel will give you a list of all programs installed on the machine. PhysX will show up as either "Aegia PhysX" or "NVIDIA PhysX" along with it's version number
Anyway, you can check the installed PhysX engines in the folder "c:\Program Files (x86)\NVIDIA Corporation\PhysX\Engine\" (on Windows 64-bits) or "c:\Program Files\NVIDIA Corporation\PhysX\Engine\" (on Windows 32-bits). If a folder with the name "v.2.6.0" exists and contains the files PhysXCooking.dll and PhysXCore.dll you're good.