AGEIA PhysX 6.09.28 WHQL driver for Windows XP 32bit version. Also includes drivers for XP 64bit version and Vista RC1 32bit and 64bit versions.
It is highly recommended to always use the most recent driver version available.
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Try to set a system restore point before installing a device driver. This will help if you installed a wrong driver. Problems can arise when your hardware device is too old or not supported any longer.