SCHAPPY — 25. March 2009, 20:29

[SOLVED] Code 39 with CD-/DVD devices in device manager in XP/Vista

Problem: Yellow warning sign in front of all CD-/DVD devices in device manager.

Solution: Open the registry editor and navigate to the key HKEY_LOCAL_MACHINE -> SYSTEM -> CurrentControlSet -> Control -> Class -> {4D36E965-E325-11CE-BFC1-08002BE10318}.
Check the properties of the following keys:

* LowerFilters: PxHelp20
* UpperFilters: GEARAspiWDM

Alternatively, delete both keys. Reboot the system, all devices should be detected and installed automatically.

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