CD enum stuck in registry

[JeffO]

One of our techs has a Dell GX-110 that had a Sony CD
drive. They added a Yamaha CDRW. Both worked. Now they
took the Sony out and added a Plextor DVD writer. Now
nothing works.
I downloaded the latest Intel IDE Chipset drivers and that
helped Device Manager, but no drive appeared in Explorer.

They unhooked all devices and rebooted. The BIOS is
cleared and the drives are gone from Device Manager and
Explorer, but they're stuck in the registry as enumerated
devices. I found them in the Computer Management console
under Removeable Storage and deleted them.
We turned it off, hooked the Plextor up, set it in the
BIOS, and now Device Manager has the new drive okay, but
still no drive in Explorer.
The devices are still stuck in the registry.
Regclean doesn't help.
Rescanning Device Manager doesn't help.
As far as I can tell, this is a service problem, but what
service and how to fix it?
These services come to mind:
cdrom
Cdralw2k
Cdr4_2K

Anyone have an idea?

 

[JeffO]

Found out about the "upper" and "lower filters" and
believe that may have helped, but I was too late. The tech
tried reinstalling. At the reboot, the Windows installer
can't find the CD drive. He called in help and someone
came with three other CD drives that are known good. Seems
like all this started with the flaky nature of the old
Dell GX-110's. The BIOS's in these Dells (and the older GX-
200's) are terrible; not very PnP. So much of the BIOS has
to be meticulously revisited and manually set. Nothing
that is automatic works automatically. But knowing that,
we still can't get the drives to keep working.

 

[Vanguard °°°]

One of our techs has a Dell GX-110 that had a Sony CD
drive. They added a Yamaha CDRW. Both worked. Now they
took the Sony out and added a Plextor DVD writer. Now
nothing works.
I downloaded the latest Intel IDE Chipset drivers and that
helped Device Manager, but no drive appeared in Explorer.

They unhooked all devices and rebooted. The BIOS is
cleared and the drives are gone from Device Manager and
Explorer, but they're stuck in the registry as enumerated
devices. I found them in the Computer Management console
under Removeable Storage and deleted them.
We turned it off, hooked the Plextor up, set it in the
BIOS, and now Device Manager has the new drive okay, but
still no drive in Explorer.
The devices are still stuck in the registry.
Regclean doesn't help.
Rescanning Device Manager doesn't help.
As far as I can tell, this is a service problem, but what
service and how to fix it?
These services come to mind:
cdrom
Cdralw2k
Cdr4_2K

Anyone have an idea?

Not sure what you mean by "stuck" in the registry? When you delete the
entries in the enumerated device list that is for the old (and now
non-existent) drive, does it reappear on a reboot? Have you searched
through your .inf files to see if the INF file for the old drive is
still there (and renamed or deleted it)? I had a problem with a modem
that a driver uninstall would leave behind the INF file, so the modem
got detected and an old driver (actually a definition) got reused on
startup and I never got the opportunity to get a prompt saying "new
hardward found" where I could then install the new driver. I had to
delete the enumerated device key AND delete the old INF file for the
modem so on the next reboot the "new" hardware got detected but no INF
definition existed so I would prompted to install the driver for it.