Hi!! I have a Dell 2400 desktop & last nite I was trying to add a cd to my iTunes but the CD Rom would not work & I could not see it in My Computer. I went to help and unstalled & reinstalled it in Device Manager but I got an "Error Code 39" I then went to Microsoft website & looked up this error & it said to do things with the registry to gget it back working again... So, I deleted the Keys it told me to (some keys called 'UpperFilters' and 'LowerFilters' (@ HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318} I then rebooted the comp, but this didn't work...I then went back in & deleted the UpperFilter and LowerFilter keys from folders above and below from where I just deleted the last one, when I rebooted it again, the comp came on but now the mouse & keyboard won't work! I have tried restarting in last configuration, safe mode etc but they still don't work! I tried using a USB mouse & keyboard, and even a wireless mouse but they still don't work!! I can't do anything with the computer because both the mouse & keyboard won't work, hence not letting me do a restore to a previous date . I called Dell & spent over an hr on the phone but it was a waste of time!! I can't even reinstall XP because my CD Rom don't work!! Sorry this is so long...but my head is fried trying to get this computer working again! Does anybody have any ideas that might help? Thanks Annette

Why would you do such a thing to begin with. You seem to be savy enough to search for answers to your problems...you should have known better than to just go screwing around with the registry. Now you should have done a Backup to the registry before you went and changed anything. If so then you can slave the drive and replace the old registry with the back-up copy...if you didn't then you are going to have to figure out exactly what keys were deleted and where they were located. But then even that may not be enough to get you back up and going. Since you have done issues with the registry, I don't believe system restore will actually reset the registry so that would be out of the question. I think that i would slave the harddrive to another computer and save all your personal data and then reinstall the operating system. Lesson learned? It is the disadvantaged who habitually elect Democrats on the belief of personal change--- yet they remain disadvantaged.

What you did was an honest mistake many of us make-it's part of our PC learning process. Try installing your operating system with what ever disks you have that it is contained on. Even if its from a recovery diskett. Either use the repair option or the reinstall over old operating system option-This should save your old setup and re-add the hardware you lost. Hope this helps :)

Your CD drive should work from the start up. The Windows registry doesn't come into play until Windows starts. Before then the BIOS/CMOS controls the drives.

Solve the CD problem first. Boot up into BIOS and check if the CD Drive is recognized. Your whole problem may have begun simply because the drive itself has failed. Can you change the boot order to CDROM first and insert a bootable disk then reboot. If you do not have any bootable CDs then set boot order to floppy first and boot up with a 98 bootfloppy "with CDROM Support" and see if you can access any disk in the CDROM drive. If it won't read in DOS then the drive is toast. Once you have a working CDROM drive you need a XP instal disk in order to boot it up into recovery console. If you can get that far it should be possible to run RESTRUI ( System Restore) from the commandprompt Goin' Fishin' (Some day)

Richard59. I did as you said and the CD rom worked. I inserted the XP reinstallation disc that I have and selected recovery console. I got as far as the C:/Windows> and I entered the commandprompt RESTRUI but it was not accepted. Instead I have to enter one of the following commands: http://support.microsoft.com/kb/314058 I do not know where to go from here! Any input would be greatly appreciated.