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how do I manually remove NIC registry entries and redetect NICs

Posted on 2007-04-10
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Last Modified: 2013-11-09
Because of some flakey behaviour introduced after a a brief and failed experiment with adaptive load balancing on a dual nic team adapter I would like to remove all of the NIC entries and let the OS properly re-detect the NICs with no previous configuration information retained. The system is a Windows 2000 member server running Exchange 2000 all patched.

My intention would be able to return the stack to the default configution. In the past on other machines perhaps I have been too agressive in removing registry entries, but  I have not had much success in successfully removing the devices without totally breaking the ability of the OS to redetect the NICs.

I have searched everywhere for a procedure and not found what I need. Can anyone help? Thanks in advance.
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Question by:thanecampbell
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Pber earned 250 total points
ID: 18883690
Load the registry then go here:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Network.

Some of the GUID keys are the NICS
Expand the guid keys and look for the subkey connection.  These are the NICS, you can delete these.

Also you need to load computer Management and then select Device Manager
Delete the NICS under Network Adapters
Then click view, show hidden devices.

There will be more hidden nics there that show up under Network Adapters  Delete the ones you see fit.
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Author Comment

by:thanecampbell
ID: 18883898
Thanks for your response above
Given I would like to regain a default configuration, do i have no need to be concerned with the sub-key registry entries that show up at
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}
or the various nic device IDs that show up under
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\ **deviceID**
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LVL 26

Expert Comment

by:Pber
ID: 18883938
When I need to wipe out the nic configs like you request  Usually because:
- something flakey is happening
- I get Local Area Connect #6 and I have only one nic
- It tells me that the IP address is already configured (but it on a hidden nic)

I do exactly what I mentioned above

I dump everything in the device manager, including hidden nics
then dump all reg entries that have a CONNECTION subkey under the GUID and then reload device manager and scan for hardware and usually everything is good after that.
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