Computerhilfen.com: HL-DT-ST DVDRAM GSA-T20N ATA device is not working

I have deleted and restarted the PC, and I get the message that it could not load as the file may be corrupt, I have tried restoring to a date prior to my uninstalling itunes, this does not work. I have followed yur advise to reset the regedit upper and lower filters to 0, and have also tried a registry (http://www.computerhilfen.com/explanation-r-Registry.html) fix program and drive detective, non of these have worked either. I have looked on line for the drive to no avail. Windows (http://www.computerhilfen.com/explanation-w-Windows.html) and my PC manufacturer don't seem to be a great help either. Can you suggest any other methods. Does the Vista disc have a fix tool and will it auto boot up on startup, if so would you suggest this as a lat option, I don't really want to have to installl windows (http://www.computerhilfen.com/explanation-w-Windows.html) again. 

If this  tip (http://www.computerhilfen.com/hilfen-26-186214-0.html) didn't help out, you could try booting with the windows (http://www.computerhilfen.com/explanation-w-Windows.html) disc and enter the repair mode - maybe that helps, but i never tried for myself :)