Solved enabled cdfs.sys; DVD still doesn't recognize media

January 8, 2015 at 00:50:12
Specs: Windows 7
My DVD-RW quit recognizing media, whether blank, pre-recorded by computer or for retail sale. I found my cdfs.sys disabled. I fixed the cdfs.sys - it is now enabled, as is the udfs.sys (I didn't check it before applying fixes. It could have been enabled the whole time)

Despite my corrections, the drive still can't read media.

See More: enabled cdfs.sys; DVD still doesnt recognize media

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January 8, 2015 at 03:02:43
Most likely you need a new optical drive.

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January 8, 2015 at 03:53:21
Run Farbar Service Scanner ( FFS )
Make sure all the boxes are checked.
Press "Scan".
It will create a log (FSS.txt) in the same directory the tool is run.
Please Copy and Paste the contents of the log in your next reply.

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January 8, 2015 at 08:48:22
✔ Best Answer
Does it read CDs but not DVDs? Or no media at all? As I understand it, there are separate lasers for CDs & DVDs. If your drive reads one type of disc but not the other, one of the lasers is probably bad which means the drive will have to be replaced.

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January 8, 2015 at 11:04:20
Unfortunately, most of my possessions are in storage. i only have one DVD with me and no CDs. I will try and borrow one to see if it makes a difference.

I don't see how it helps but I have pasted the log from running FFS:

Farbar Service Scanner Version: 21-07-2014
Ran on 08-01-2015 at 11:00:48
Microsoft Windows 7 Home Premium Service Pack 1 (X64)
Boot Mode: Normal

Internet Services:

Connection Status:
Localhost is accessible.
LAN connected.
Google IP is accessible. is accessible. is accessible.

Windows Firewall:

Firewall Disabled Policy:

System Restore:

System Restore Disabled Policy:

Action Center:

Windows Update:

Windows Autoupdate Disabled Policy:

Windows Defender:
WinDefend Service is not running. Checking service configuration:
The start type of WinDefend service is set to Demand. The default start type is Auto.
The ImagePath of WinDefend service is OK.
The ServiceDll of WinDefend service is OK.

Windows Defender Disabled Policy:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender]

Other Services:

File Check:
C:\Windows\System32\nsisvc.dll => File is digitally signed
C:\Windows\System32\drivers\nsiproxy.sys => File is digitally signed
C:\Windows\System32\dhcpcore.dll => File is digitally signed
C:\Windows\System32\drivers\afd.sys => File is digitally signed
C:\Windows\System32\drivers\tdx.sys => File is digitally signed
C:\Windows\System32\Drivers\tcpip.sys => File is digitally signed
C:\Windows\System32\dnsrslvr.dll => File is digitally signed
C:\Windows\System32\mpssvc.dll => File is digitally signed
C:\Windows\System32\bfe.dll => File is digitally signed
C:\Windows\System32\drivers\mpsdrv.sys => File is digitally signed
C:\Windows\System32\SDRSVC.dll => File is digitally signed
C:\Windows\System32\vssvc.exe => File is digitally signed
C:\Windows\System32\wscsvc.dll => File is digitally signed
C:\Windows\System32\wbem\WMIsvc.dll => File is digitally signed
C:\Windows\System32\wuaueng.dll => File is digitally signed
C:\Windows\System32\qmgr.dll => File is digitally signed
C:\Windows\System32\es.dll => File is digitally signed
C:\Windows\System32\cryptsvc.dll => File is digitally signed
C:\Program Files\Windows Defender\MpSvc.dll => File is digitally signed
C:\Windows\System32\ipnathlp.dll => File is digitally signed
C:\Windows\System32\iphlpsvc.dll => File is digitally signed
C:\Windows\System32\svchost.exe => File is digitally signed
C:\Windows\System32\rpcss.dll => File is digitally signed

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January 8, 2015 at 13:51:50
"I don't see how it helps but I have pasted the log from running FFS:"
All good.

How to Clean a Laptop CD Laser

How to Clean DVD Drives

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January 8, 2015 at 18:23:10
Just take very good care with cleanliness if you are tempted to take a CD/DVD drive apart. Strictly speaking it should be done in "clean room conditions". Obviously if it is that or replacement then there is nothing lost in trying.

Always pop back and let us know the outcome - thanks

message edited by Derek

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January 8, 2015 at 19:05:42

I have disassembled optical drives and cleaned the lens without any incident. Optical drives by design are not sealed.

Are you thinking of hard drives. Maybe a bit late in the UK?

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January 8, 2015 at 19:18:40
Err..yes, you are probably right on both counts.
I have done the same with CD/DVD drives. Just general cleanliness is sufficient.
I've done some strike out's in my post

Always pop back and let us know the outcome - thanks

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January 20, 2015 at 22:45:39
Thank you for your help all!

It's an old laptop I bought used and I have a newer Lenova that just needs a new power cord so I think I will just trash the older one. By trash, I mean shred the files on the hard drive, take out everything and play around with it, put it all back and see if there are any pieces left over. '-) I already promised it to a friend back when I acquired the Lenova. As soon as I have "refurbished" it to the best of my ability, I'll give it to her.

Thank you again! I know where I will be looking for answers the next time I have a problem with one of my computers!!

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