Download driversweeper, there is a option to delete reg/data stuff from your system, restart your computer and try installing it again.


1. Uninstall the drivers from Add/Remove programs in the Control Panel of Windows.
2. Restart the computer.
3. Run Driver Sweeper*, select the Driver/files that you have uninstalled and click Clean button.
4. Install the new Program/drivers.

* For Windows Vista users, please run Driver Sweeper in administrator mode.
Right mouse click Driver Sweeper shortcut and click Run as administrator.

To download and install Driver Sweeper, please click HERE. (direct link)
Save DriverSweeper_1.5.5-setup-[Guru3D.com].exe file on the hard disk.
Run DriverSweeper_1.5.5-setup-[Guru3D.com].exe.

 

Works!!

Thnxs a lot bro really apreciate it

 

Thanks for the update :grinthumb

 

Here's what I did. Use revo uninstaller & remove Ageia. When that's done,make sure that Ageia is deleted from program files. Then, go to start, run, and "regedit". In the registry editor, go HKEY --->Local Machine--->Software & then delete the Ageia Physx key. When that is done, you can then install whichever older version you like. I tried everything else, but this one really worx.