I am dealing with the an issue im running an Acer aspire 5600z my dvd-rw is an optiarc ad-7643s which IF there are drivers for it i havnt found them. here is a list of things tried 1. ran "fix it " program from microsoft actualy ran them all. 2 deleted upper and lower filters in reg. 3. changed start value for three programs that were diabled after doing re install win 7 home pro sp1.. cdfs.sys, udfs.sys, crcdisk.sys were all disabledi changed them all from a #4 to #1's now driers are working (enabled). deice mnger uninstalled and reboot..basicaly when i put in a disc it accepts it and begins to spin up and shortly after it makes a click and shuts down raeding on disk found or wrong format drive not recognizing disk.... bios sees it its in my computer i can eject i frorm control panel...ive uninstauled nero and when i tried to install itunes i got an error message telling me to reinstall itunes that itwas unable to transfer music or movies because some of the registry component were missing that it normaly usses for this function..this is my girlfriends BABY and i should of knew better than to even start on it but im commited and therefore if it dont get fixed umm neither do i ...ssooooo please can someone out there thow me a bone...thanks ps i have alsoupdated all drivers and uninstalled the controller and let it reinstall .sfc/scannow through comand. will post more as i do it thanks