Drives missing from My Computer

[Jan Smit]

I have a Compaq Evo N160 notebook running under W2k (SP4).
The system has a swappable (LG) DVD-ROM. I recently
inherited an old HP CD-Writer Plus 8210e (USB connection).
I downloaded the W2k driver from the HP site, installed it,
and everything was working like a charm. I then made the
mistake of installing the Direct Letter Access software
(which is supposed to work with the CD-RW drive under W2k):
neither the DVD drive nor the CD-RW drive show up any more
under My Computer. Device Manager says that the CD-RW drive
is working fine; for the DVD drive it gives: "Your registry
might be corrupted. (Code 19)".

I have (of course) uninstalled DLA, and tried to reinstall
the CD-RW driver (the DVD driver is on a CD), but to no
avail. I have looked at KB, and Googled, but could not find
a description of my problem. I have the permissions the
Device Manager Troubleshooter says I should check. I guess
I have to delete something manually from the registry, but
am not sure exactly what.

Any guidance would be much appreciated.

 

[Jason Hall [MSFT]]

--------------------

Sender: "Jan Smit" <[email protected]>
Subject: Drives missing from My Computer
Date: Mon, 17 May 2004 05:58:28 -0700

I have a Compaq Evo N160 notebook running under W2k (SP4).
The system has a swappable (LG) DVD-ROM. I recently
inherited an old HP CD-Writer Plus 8210e (USB connection).
I downloaded the W2k driver from the HP site, installed it,
and everything was working like a charm. I then made the
mistake of installing the Direct Letter Access software
(which is supposed to work with the CD-RW drive under W2k):
neither the DVD drive nor the CD-RW drive show up any more
under My Computer. Device Manager says that the CD-RW drive
is working fine; for the DVD drive it gives: "Your registry
might be corrupted. (Code 19)".

I have (of course) uninstalled DLA, and tried to reinstall
the CD-RW driver (the DVD driver is on a CD), but to no
avail. I have looked at KB, and Googled, but could not find
a description of my problem. I have the permissions the
Device Manager Troubleshooter says I should check. I guess
I have to delete something manually from the registry, but
am not sure exactly what.

Any guidance would be much appreciated.

-------------------

Going on the "registry might be corrupted" direction, the entries for the
drives on your machine are stored in:
HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices

Try exporting this key, then deleting the entry that pertains to the DVD
drive. After you reboot, the value will be recreated automatically.
This might resolve your issue.

--
~~ JASON HALL ~~
~ Performance Support Specialist,
~ Microsoft Enterprise Platforms Support
~ This posting is provided "AS IS" with no warranties, and confers no
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message are best directed to the newsgroup/thread from which they
originated.

 

[Guest]

Many thanks for your reply Jason

After posting I searched some more and came eventually across the exact description of my problem, but for different CD-writing software. The solution was to delete the UpperFilter and LowerFilter entries from HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class{4D36E965-E325-11CE-BFC1-08002BE10318}

I don't know what Upper/LowerFilters do, but it worked in my case.