We reinstalled XP on a new HDD, everything went smooth! XP SP2 OEM. After install, proceeded with hardware drivers, all installed seemingly fine. Activated Windows, installed HP printers, FireFox, AVG, and K-Lite Mega Codec Pack. Everything installed was downloaded, except LAN drivers loaded from a flash drive. So we never accessed the DVD drives (there are 2). Then, finally we try to access it, and the drives aren't in My Computer. Check device manager, and they are there, but with the ominous yellow exclamation mark. Device status says something to the effect of device driver loaded but hardware not found. Same thing for both drives. Both drives are labeled correctly in device manager. So, I check Sony, there is a registry patch: http://esupport.sony.com/US/perl/sw... None of the reasons for this problem match, but the symptom is the same. So, I try it, but it doesn't work. Then, I uninstalled it from device manager, hoping to force XP to reinstall the drivers. Reboot, and XP installs the drivers again, and has the same problem. Now I'm stumped, what should I do now? This is on a Sony Vaio VGC-RB40 The drives are: Sony DVD RW DW-D22A Sony DVD ROM DDV1615 ~~Dylan

hi i'm not sure if this helps but i have the exact same problem as you except that my cd drive does not show in either device manager or my computer.... i have two solutions for you 1) in regedit......window(that little icon between ctrl and alt)+r-->then type regedit.......find this location........HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}.....and delete the upper and lower filters...they should be called exactly that.....once you've done that a restart is required...you may need to do that in these locations also HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}\ and HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318} if that doesn't work try this there is a program on this site that can tell you what the problem of the unknown device is in your device manager and you can find the downlaod for it on google.....i am not quite sure on how o use it exactly but i hope u can figure it out.... the link for the program is..... http://www.zhangduo.com/unknowndevi... and the youtube link for the first solution is.... http://www.youtube.com/watch?v=kyFR... there is a link to a website called fixya in the video description it might be good if you checked it out too... http://www.fixya.com/support/r54839... i hope this was helpful