How to delete reg entry HKLM\System\ControlSet001\Enum\Root\Legacy

John F. Davis

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Oct 23, 2008, 3:31:02 PM10/23/08

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HKLM\System\ControlSet001\Enum\Root\Legacy_gpdev

When I try to right click it says can not delete ... error while deleting key.
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Thanks in advance

Don Burn

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Oct 23, 2008, 3:33:36 PM10/23/08

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You need to change the permissions to deletel from the enum key.

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Don Burn (MVP, Windows DDK)
Windows Filesystem and Driver Consulting
Website: http://www.windrvr.com
Blog: http://msmvps.com/blogs/WinDrvr
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John F. Davis

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Oct 23, 2008, 3:41:00 PM10/23/08

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How do you change persmissions in enum key? I am in the registry.
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Thanks in advance

Don Burn

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Oct 23, 2008, 3:42:22 PM10/23/08

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In regedt32 right click on the item you want permissions is an option.

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Don Burn (MVP, Windows DDK)
Windows Filesystem and Driver Consulting
Website: http://www.windrvr.com
Blog: http://msmvps.com/blogs/WinDrvr
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John F. Davis

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Oct 23, 2008, 3:59:01 PM10/23/08

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Thanks. That worked. Unfortunately it does not explain why I still can't
do a CreateFileOpen in my user code. I get an error, 2 when it tries to open
\\.\GpdDev using either OPEN_EXISTING or CREATE_NEW. This is after I have
created and started the driver/service.

In the DebugView, I see only two messages from my driver. One is for
DeviceEntry which gets called as a result of me Creating the driver/service
and the other is within driver entry where I call IoCreateDevice and I get a
good return code (0) from the call.

I have a DebugPrint for every other driver routine and none of them are
called.

Don Burn

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Oct 23, 2008, 4:09:55 PM10/23/08

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How about the call to IoCreateSymbolicLink to allow the device to be opened
from user space, what does it return?

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Don Burn (MVP, Windows DDK)
Windows Filesystem and Driver Consulting
Website: http://www.windrvr.com
Blog: http://msmvps.com/blogs/WinDrvr
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Kerem Gümrükcü

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Oct 27, 2008, 1:32:16 AM10/27/08

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Hi John,

you rightclick on the key (folder) on the left treeview and
then select something like security/permissions. I dont
know whats displayed on a english localized windows
there, since my vista ue displays me "Berechtigungen..."
which stands for "Permissions..."
Dont forget to apply the security settings to sub-objects
of the registry tree, so that you can delete the complete key
and its values,...

Regards

Kerem

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David Craig

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Oct 27, 2008, 2:41:07 AM10/27/08

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Resplendence has an excellent product for registry editing and viewing. I
have been using it for many years and it combines the capabilities of
regedit and regedt32 with a better user interface and searching
capabilities.

However, I still recommend using Symantec Ghost (not Norton Ghost) booting
from a USB stick to save the OS images to a second hard drive that is
formatted with FAT32. It takes about 10 minutes to save a partition that is
used for testing and about the same to restore it. I normally use the drive
to and from image so I make sure I get all the partition records including
the master boot record. I can switch between XP, Server 2003, Vista, and
Server 2008 easily and quickly to undo all the entries created by the OS for
a hardware device. In my case it is a network controller and by setting the
options in the boot.ini properly each image boots and stops to allow me to
choose if I want to run in /onecpu mode and with a 1394a windbg session or
serial, if desired. Get two hard drives with the first being about 80GB or
so and the second as large as you might need. I split the second into a
large FAT32 partition for Ghost images and the other to hold any test tools
I might need to install or have available. Using the kdfiles file on the
host system keeps my windbg sessions using the latest version of the driver
without all the 'update driver' steps after the first install is done. It
also bypasses all the signed driver warnings.

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