Batman Fails To Launch

[scrawny]

So I have batman installed via Steam and I've actually managed to clock the game. But I want to go back and complete all the riddler challenges. But now the game won't even start.

I get the bmLauncher.exe pop-up window appear where I can configure settings etc., if I hit "Play" I get an hour glass for about 3 seconds then nothing. I monitored the processes list in task manager and the batman app appears then disappears when this happens.

Has anyone had this before and is there a way of troubleshooting this bug?

(have already tried deleting and reinstalling, have also tried backing up to USB and reinstalling it on my laptop - which works on my laptop... but the laptop is too poorly spec'd to run the game at a decent pace - prefer the PC).

The specs of my PC are:
2.4Ghz Quad Core
4GB RAM
Windows XP 32 bit
320GB SATA HDD
NVidia GTX 260+
Asus MoBo
(was there something I missed?)