When I insert a disk in drive (MATSHITA UJ- 840D ATA), the light turns yellow like it's starting. I can hear the disk spin; then it just stops, and the light goes out. The drive won't play, read, or even recognize a disk in the drive.

I checked the device manager. It displays the disk drive with a yellow triangle with an exclamation point in it. When I click on the device properties, it says:

Windows cannot load the device driver for this hardware. The driver may be corrupted or missing. (Code 39)

Click 'Check for solutions' to send data about this device to Microsoft and to see if there is a solution available.

I tried checking for solutions. Vista says that it could not load driver software. It begins checking for solutions and stops.

I've tried installing all the drivers I can find on the windows vista website and the hp website.

I don't know what to do because I have to have my disk drive to install software and burn disks.

Please help.

I believe one person found this happening after installing Itunes. If you have that, check to see if it still works. I don't know why it happened but he continued to have problems -- not sure if it was ultimately resolved as it seemed to be one issue or the other.

Your description is exactly the same as I am experiencing. The drive worked one day then not the next. My CD drive is a Matsushita UJ-842 AMA in the expansion deck of a Thinkpad X60 tablet running Vista Ultimate. All drivers are up to date. Hope someone has a new idea.

Yes Rog - That worked for me. There was no UpperFilter in that registry key but there was a LowerFilter that I deleted. After re-booting, the CD driver was available agin. I have no idea how this happenined, but am very thankful for your help in finding the fix.

Follow the directions here to delete the upper and lower filter values in the registry. Then remove the device from the Device Manager and reboot:

http://support.microsoft.com/default.aspx?scid=314060

http://support.microsoft.com/kb/320553/