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Windows 7: Fix to CD-DVD not recognized (explained)

29 Jun 2016   #1

Windows 7 Pro 32-bit
Fix to CD-DVD not recognized (explained)

I just fixed my W7 laptop so that it now recognizes my built in CD-DVD drive properly by manually changing the registry by adding:

1. Controller0 to atapi here: HKLM\System\CurrentControlSet\Services\atapi\Controller0
2. EnumDevice1 = 1 to Controller0

The procedure described: and in many threads online.

Presumably the change tells the OS what ATAPI channel the CD-DVD drive uses or am I wrong? Maybe someone can explain in simple terms exactly what this fix does. Thanks.

As a besides the same fix can be done (I haven't tried this) from the CMD window by executing the below:

reg.exe add "HKLM\System\CurrentControlSet\Services\atapi\Controller0" /f /v EnumDevice1 /t REG_DWORD /d 0x00000001


My System SpecsSystem Spec
29 Jun 2016   #2

Windows 7 Professional, SP1, x86

I'm sorry..... if you've already fixed it, what more can we tell you?

Every time I've had a good CD/DVD that the OS is not seeing, I just run a little registry script that says:

Windows Registry Editor Version 5.00


After removing those filters, and a reboot, Windows will once again be able to see the CD/DVD drive.

Maybe someone else can benefit from that info.

Cheers Mate!
My System SpecsSystem Spec
30 Jun 2016   #3

Windows 7 Pro 32-bit

...if you've already fixed it, what more can we tell you?

Well, you could answer my query and explain in simple terms exactly what this (Controller0) fix does. Or, if this is above your pay level, perhaps someone else can.

Your suggestion to delete the "LowerFilters" and "UpperFilters" is covered in that same KB314060 article. In my case of no relevance as I had neither/nor. But, good that this works for you (by script or manually).

Thanks mate...
My System SpecsSystem Spec


 Fix to CD-DVD not recognized (explained)

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