Windows XP can have a problem where your CD-ROM, CD-RW, DVD-ROM, DVD-RW (any optical drive) does not show up as a drive letter, and Device Manager shows a yellow exclamation point. (CDROM Device appears with a "!")
You've likely already tried the normal deletion of the device and a reboot, but with no fix. The device comes back but still shows with a problem / error / fault status.
If you have extra hardware, you may have even replaced the drive thinking it was broken. Or used a different brand thinking the drivers may be different. Yet still none of these fixes work.
Here is one fix we've used often, and found fixed the problem with a simple registry edit and reboot:
1. Click Start, then Run
2. Type: regedit
3. Drill down the tree to the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}
Note: There are a lot of keys starting with 4D36E... and ending with ...E10318, be careful to find the correct one.
4. Find the two Multi-String values named UpperFilters and LowerFilters and blank out their values.
Note: Don't delete the values or the key, just highlight the data and delete the contents.
5. Reboot. After the reboot, you should have a
drive letter assigned to your optical drive and Device Manager should no
longer show a yellow exclamation point!
www.jacksontechnical.com/article.htm?id=42
www.jacksontechnical.com/article.htm?id=42
