Windows XP sp3 suddenly won't recognize the tsstcorp cddvdw ts-l632n optical drive in my HP dv5810us Notebook. I tried several restores, have used regedit to remove the upper and lower filters, have done countless searches on the web for appropriate drivers, and tried to manually re-install many of the generic DVD dtivers using Windows device manager, and Microsoft's Automated Trouble Shooter. Nothing works to restore my dvd reader/ writer.