Note: To use this method, you must be logged on to Windows as an administrator. Note If you do not see the LowerFilters registry entry, go to the next method. When you are prompted to confirm the deletion, select Yes. If you do not see the UpperFilters registry entry, you still might have to remove the LowerFilters registry entry. Note You may also see an UpperFilters.bak registry entry. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\ In the navigation pane, locate and then select the following registry subkey: If you are prompted for an administrator password or for a confirmation, type the password, or select Allow Type regedit in the Run dialog box, then press Enter. Press the Windows logo key + R to open the Run dialog box. To use Registry Editor to delete the corrupted Registry entries, follow these steps: This may not fix your particular problem having this behaviour, but it's an easy step in the troubleshooting process.This problem may be caused by two Windows registry entries that have become corrupted.
Microsoft's official Knowledge Base article describing the same problem and fix: REG file that can be saved to disk and imported into your registry that fixes the values above: Windows_XP_CDROM_Fix.REG 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!įor your convenience, here is a. Note: Don't delete the values or the key, just highlight the data and delete the contents. Find the two Multi-String values named UpperFilters and LowerFilters and blank out their values.E10318, be careful to find the correct one. Note: There are a lot of keys starting with 4D36E. Drill down the tree to the following registry key:.
Here is one fix we've used often, and found fixed the problem with a simple registry edit and reboot: Or used a different brand thinking the drivers may be different. If you have extra hardware, you may have even replaced the drive thinking it was broken.
The device comes back but still shows with a problem / error / fault status. You've likely already tried the normal deletion of the device and a reboot, but with no fix. 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. Technical Reference: FIX: Windows XP CDROM doesn't work - Device Manager shows Exclamation Point
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