Dave -
Thanks so much for responding. I found some of the same
info on DEJA.COM that addresses the UpperFilters and
LowerFilters keys in the Registry. Being absolutely sure
that I had found the right keys in the Registry, I deleted
them and rebooted my PC. When I opened Windows Explorer,
there was my CDRom!!! What I didn't mention in my
original email (for the sake of brevity) was that awhile
back, I was unsuccessful w/ installing a HP CDRom drive w/
Adaptec drivers and ended up uninstalling it. When I did
that, apparently it did not completely clean up afterwards
and left the UpperFilters and LowerFilters for the HP in
the Registry. The article in DEJA.COM said something
about hibernation of the Win2K CDROM drivers that I didn't
understand. Anyway, I achieved fixing my problem! Thanks
again, Dave. I will keep your response for future
reference.
Dory
>-----Original Message-----
>CM_PROB_FAILED_ADD
>Text that is displayed in Device Manager:
>This device is not working properly because Windows
cannot load the drivers
>required for this device. (Code 31)
>Solution button: None
>Cause
>This error message can occur for either of the following
reasons:
>If the operating system calls the driver's AddDevice
routine and is
>unsuccessful, or if the operating system fails to load a
dependent device or
>filter driver.
>
>
>After unloading a driver, Windows 2000 did not close its
handles, delete its
>device names, and so on. From Object Manager's
perspective, this indicates
>that the old object/device never went away, so the system
does not create a
>device object for a device that reappears because of a
possible object name
>collision.
>
>Troubleshooting;
>This behavior is usually caused by an issue in the device
driver. Verify
>that the driver you are using is digitally signed for
Windows 2000. In the
>second situation described above, the error message is
resolved after you
>restart the computer. To prevent this behavior from
occurring again, obtain
>a Windows 2000 signed driver from the device manufacturer.
>
>If a dependent filter driver is not able to start, you
can view the device
>class key in the following registry key:
>HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Class
>Locate the device type that is reporting the error 31,
and the view the
>upper filter or lower filter entries. Make sure
associated service entries
>are located in the following registry key:
>HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services
>You can either troubleshoot the dependent service or
remove the offending
>upper filter or lower filter entry from the class
registry entry. For
>example, the mouse reports an error 31, therefore, this
is the mouse class
>entry.
>HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Class\
{4D36E96F-E325-11C
>E-BFC1-08002BE10318}
>upperfilters:RegMultiSz:mouclass OffendingDriver
>
>You can either troubleshoot why the OffendingDriver does
not start, or
>remove the OffendingDriver entry from the upper filters,
and then restart
>the system.
>
>(note: I usually like to create a backup hardware profile
when changing the
>startup type and or parameters for any service/ device
drivers.)
>
>
>--
>Regards,
>
>Dave Patrick ....Please no email replies - reply in
newsgroup.
>Microsoft MVP [Windows NT/2000 Operating Systems]
>
>"Dory" wrote:
>> My main CDRom drive has disappeared from my Windows
>> Explorer. My OS is Win2000 Prof. The Device Manager
>> displays this error message.
>>
>> "This device is not working properly because Windows
>> cannot load the drivers required for this device. (Code
>> 31)"
>>
>> I can boot up w/ a bootable CD loaded, so I know the
drive
>> works.
>>
>> Any chance of just copying the driver from the Win2K
>> install CD to the correct directory, and updating the
>> driver through Device Manager?
>>
>>
>
>
>.
>
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