Like most apps, it is more likely to work on a 32 bit system than a a 64 bit. It ran fine for me on Windows 7 x64, so I am sure it would run just fine on a 32 bit Windows system. The only problem I had was getting a picture when loading a race. Switching to Windows XP SP3 compatibiliy mode seemed to solve this for me. Just download the demo and try it, it's free.