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  CODE 41 
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ernest ofori Dec 11, 2004, 03:05pm EST Report Abuse
I got this message all of a sudden "(concerning my 2 dvd writers)
Windows successfully loaded the device driver for this hardware but cannot find the hardware device. (Code 41)
Any ideas......thanks

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Chris McNally Dec 11, 2004, 03:25pm EST Report Abuse
>> Re: CODE 41
Advice from Big Bill's fun factory:

A driver was loaded but Windows cannot find the device. This happens when Windows does not detect a non-Plug and Play device.
If the device was removed, uninstall the driver, install the device, and then click Scan for hardware changes to reinstall the driver. If the hardware was not removed, obtain a new or updated driver for the device.

If the device is a non-Plug and Play device, a newer version of the driver might be needed. To install non-Plug and Play devices, use the Add Hardware wizard. Click Performance and Maintenance on Control Panel, click System, and on the Hardware tab, click Add Hardware Wizard.

On the General Properties tab of the device, click Troubleshoot to start the troubleshooting wizard


Chris McNally

Moderator - Hardware Analysis
ernest ofori Dec 12, 2004, 02:53pm EST Report Abuse
>> Re: CODE 41
Thankx for your reply, but I have tried all that and they are still not working

ernest ofori Dec 12, 2004, 03:11pm EST Report Abuse
>> Re: CODE 41
Anyway I have resolve the issue:

To resolve this behavior, follow these steps:
Start Registry Editor (Regedt32.exe).
Locate the UpperFilters value under the following key in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}

On the Edit menu, click Delete, and then click OK.
Locate the LowerFilters value under the same key in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}

On the Edit menu, click Delete, and then click OK.

Thangaraj Jayaraman Jan 03, 2005, 09:29pm EST Report Abuse
>> Re: CODE 41
Wow! I had the exaxt same problem, except that mine was both cd roms. I deleted the registry entries as advised and ulinstalled the devices. Then I scanned for new hardware, and everything was back to normal in an instant!!! Thank you ernest ofori.

Ben King Jan 06, 2005, 07:02pm EST Report Abuse
>> Re: CODE 41
I had the same problem and the solution worked for me too (thanks ernest), but I was wondering if anyone knew why those registry values had to be deleted?

Julian Larah Jan 22, 2005, 06:24am EST Report Abuse
>> Re: CODE 41
Amazing! I had this problem and your solution worked. Could it be caused by a virus - the timing of my cd/dvd drive crashing coincided with getting some nasty worm (which I'm not sure that I'm rid of - is it usual to have 4 SVCHOST processes running?)

jake Jan 22, 2005, 08:38am EST Report Abuse
>> Re: CODE 41
well i'm running 5 instances of svchost and i dont have a virus, i think its just some networking process. but i'm ont sure. try googling it.

Error 34:
There was no error
Ecosse Jan 22, 2005, 10:38am EST Report Abuse
>> Re: CODE 41


Specs here > > > > >
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
ross ireland Feb 08, 2005, 04:02pm EST Report Abuse
>> Re: CODE 41
I followed your instructions but now something weird has happened. whenever i boot up it gets to the desktop but then nothing happens. i cant move my cursor so i cant do anything.

whats happened?

Hello Kitty Feb 16, 2005, 09:33pm EST Report Abuse
>> Re: CODE 41
This happened to me as well just today and what I had done was install ad aware and also did some registry editing last night because I tried to install dvd xcopy but had to uninstall but not before it installed a service and would not uninstall it. Both my cd and dvd rom drives would not show up and had yellow !. How did you come up with this fix?

I did not have lower filters just upper filters. How did this happen? I am fixed because of this by the way.


Jim Konrad Feb 17, 2005, 12:17am EST Report Abuse
>> Re: CODE 41
I had the same occured after I instaled service pac 2 for xp...tried the fix, but when hardware reinstalls I get the same problem, maybe I only know enough to be

Shawn Brown Feb 18, 2005, 06:48am EST Report Abuse
>> Re: CODE 41
Just want to thank you for "fix" by deleting the registry entry. IT WORKED!!

Gary Hart Feb 24, 2005, 01:54pm EST Report Abuse
>> Re: CODE 41
Hey, great fix action.

Could you possibly explain how the keys I deleted affected the system. Would be nice if I could explain it to the people whose computer this error was on. If not, please don't worry about it.

Nice work.

phil budas Feb 26, 2005, 04:58am EST Report Abuse
>> Re: CODE 41
Just out of curiosity had any of you guys had problems after uninstalling Itunes?

I've seen on other forums people having problems when this happened. Im off to try the above solution, fingers crossed for me.

phil budas Feb 26, 2005, 05:10am EST Report Abuse
>> Re: CODE 41
right okay, when i try and remove these keys i get the message cannot delete. there was an error.

this is driving me up the frigging wall, ive been on other forums and they all seem to point to the fact that apple's itunes is to blame, hence my previous post. ive tried the advice on other forums, and that led me here, cause they didnt work, but now i cant delete these registry keys, im going bananas with this!!!

Ecosse Feb 26, 2005, 07:27am EST Report Abuse
>> Re: CODE 41
Have you tried your reg edit in safe mode? The keys may be in use if you are in normal mode - just a thought.


Specs here > > > > >
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Shawn Brown Feb 26, 2005, 05:03pm EST Report Abuse
>> Re: CODE 41

That is it. I had just uninstalled it the day before. I guess that caused my problem.

phil budas Feb 27, 2005, 01:53pm EST Report Abuse
>> Re: CODE 41
grrrr... it still wont let me delete these keys, even in safe mode. anyone know of a program or any other method of doing this, im starting to get a little desperate.

Della Nicholls Mar 06, 2005, 06:30am EST Report Abuse
>> Re: CODE 41
I also could not delete the key and got an error message. I had uninstalled iPod and iTunes yesterday and had a suspicion that it was related. Actually I thought I must have deleted something else by mistake. After reading a few of the forums I was convinced it was iTunes. I'm not techy enough to try anything else, so I just reinstalled iTunes to see if that would work. That did it and I got both my DVD drives back.

Hello Kitty Mar 06, 2005, 10:15am EST Report Abuse
>> Re: CODE 41
try using regedit instead of regedt32. Make sure you have admin rights on your profile. Reboot and shut everything down. If you have a startup program that wants to use that key you will have to check the run key in your registry and maybe edit that. Also make sure that there are no services that you may suspect are using that information and at least stop them. You can restart them afterwards.

As a side note I had also F!@@#! around with Itunes at or about that time. I hate Apple for yet another reason!!!

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