Hi - I just upgraded from Win2000 to WinXP. This change has resulted in my Lite-On 1693s operating really poorly. It has trouble reading data cds (it takes a year for them to load in Explorer, and the listed files will not execute).It will not read a commercial DVD at all (says disk is unsupported format). It will however burn files using cd burning software. The system has three drives - the hd is on its own bus, while the Lite-On is the master on the second ide with a Toshiba DVDROM as a slave on the same ide. Anybody have any suggestions? The lite-on is running in udma-4 mode.