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Corrupted registry setting for CD-ROM

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3 replies

by naamor

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I am running W2K Pro. For no apparent reason, my CD-ROM and CD-RW are no longer available in Windows.

They are recognized by the BIOS and are available if I boot with a floppy and CD-ROM support.

I checked Device Manager, which showed an error on both devices stating
?Your registry might be corrupted. (Code 19)?

I checked Microsoft?s website. Their remedy for this problem is to restore the registry from backup. As my luck would have it, when I tried this, my backup would not work due to a problem with the file itself.

I tried deleting and reinstalling the devices as well as updating the drivers no luck.

I disconnected the CD-ROMs and rebooted, ran Regclean, reinstalled the CD-ROMs. They still give the same error.

I have also tried using Last known good configuration and well as running the W2K repair procedures. Neither option worked.

Does anyone have an ideas I can try to fix this problem? I am not looking forward to reinstalling the OS?

3 replies

by datruth

This "fix" has to do with a cdrom/cdrw hibernation problem, but it might apply to your situation, too, depending on the cdrw software you installed. Here's a quote from a newsgroup about it:

"Adaptec knows what the Hibernate and CD-ROM problem is with the 4.02 update
and it is a file called "cdralw2k.sys". When 4.02 is installed it adds
filters to the registry so that this file is used instead of "cdrom. sys".
When the Adaptec software is uninstalled the registry is not reverted to use
"cdrom. sys" and hence the Hibernate and CD-ROM problem continues.

You have to edit the registry to stop the Adaptec driver after uninstall.
The critical keys that the software leaves behind after being uninstalled
are in:

HKLM\System\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFCl-087002B
El0318}

In this section you will find two keys called "UpperFilters" &
"LowerFilters" and you will need to delete both of these keys and reboot to
restore win2K to the default CD driver.You should also search for other
keys containing "cdralw2k" and "cdr4 2K" and delete these then delete these
two files AFTER the reboot. Note you-cannot delete the references to these
in "ENUM" as they are generated from the class driver, but they will not be
there after the reboot. ---------------------------------"

So, even though this refers to a hibernation problem, it may restore your normal cdrom.sys drivers so you can use cdroms.

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