Manual removal
Each successive variant of CommonName gets harder to remove by hand. Do not try to uninstall the later variants (Mib, Zenet, Winnet) by just deleting the files. They include a Winsock2 layered service provider module (LSP); if you manage to delete this you will lose network connectivity.
CommonName/Winnet
You must first kill the 'winnet.exe' process (otherwise, it will keep setting itself up to run automatically). Press Ctrl-Alt-Delete and open the Task Manager. If you are using Windows NT/2000/XP, choose the 'Processes' tab to list all programs. Choose 'winnet.exe' and end the process.
Continue with the instructions for Zenet.
CommonName/Zenet
Open the registry (Start->Run->regedit). Open the key 'HKEY_CLASSES_ROOT\CLSID\{00000000-0000-0000-0000-000000000000}', right click the 'InProcServer32' subkey and choose 'Delete'. (This neuters the CommonName BHO but doesn't completely remove it, so it won't notice the change and re-register itself.)
Now go to the key HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run. There will be a value here titled 'Zenet' (or 'Winnet', for that variant). Delete it and reboot the machine immediately.
Continue with the instructions for Mib.
CommonName/Mib
The CNMib.dll module must now be removed from the Winsock2 LSP chain. CounterExploitation's tool LSPFix can do this for you. Download it, run it and tell it to 'Remove' CNMib.dll, and 'Keep' everything else.
You can also do it by hand if you are brave. Open the registry (Start->Run->regedit) and open the key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\WinSock2\ Parameters\Protocol_Catalog9\Catalog_Entries. There will be a list of numeric subkeys; open each one and double-click its 'PackedCatalogItem' value. You should be able to see a filename at the top of the right-hand column in the 'Edit Binary Value' window. If it is 'C:\Program Files\CommonName\Toolbar\cnmib.dll' or similar, delete the entire '00000somenumber' key. The path must point exactly at the cnmib.dll file! Do not delete the key just because you see a cnmib hanging on the end - for example '%SystemRoot%\system32\mswsock.dll.r\cnmib.dll' actually points to mswsock, not cnmib.
Then rename the numeric subkeys so that they count up each number from 000000000001, filling in any gaps you left by deleting old ones. Finally, go back up to 'Protocol_Catalog9' and change the 'Num_Catalog_Entries' value to reflect the new number of subkeys you have. Set the base to decimal in the 'Edit DWORD value' window and enter the highest number subkey that is left after renaming.
If your manual removal went wrong in any way you will have lost your networking ability. Sorry! LSPFix may still be able to rescue you in this situation, but otherwise you are looking at a reinstall of Windows or at least its networking components.
Once the LSP is gone, continue with the instructions for Agent.
CommonName/Agent
Open the registry (Start->Run->regedit) and delete the following keys and values:
HKEY_LOCAL_MACHINE\Software\CommonName
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\MenuExt\Add A Page Note
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\MenuExt\Bookmark This Page
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\MenuExt\Email This Link
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\MenuExt\Search using CommonName
HKEY_CLASSES_ROOT\BabeIE.AgentIE
HKEY_CLASSES_ROOT\BabeIE.AgentIE.1
HKEY_CLASSES_ROOT\BabeIE.Handler
HKEY_CLASSES_ROOT\BabeIE.Handler.1
HKEY_CLASSES_ROOT\BabeIE.Helper
HKEY_CLASSES_ROOT\BabeIE.Helper.1
HKEY_CLASSES_ROOT\CLSID\{00000000-0000-0000-0000-000000000000}
HKEY_CLASSES_ROOT\CLSID\{6656b666-992f-4d74-8588-8ca69e97d90c}
HKEY_CLASSES_ROOT\CLSID\{9346A6BB-1ED0-4174-AFB4-13CD4EC0AA40}
HKEY_CLASSES_ROOT\TypeLib\{D879D743-E2CC-4161-8034-2234203681C9}
HKEY_CLASSES_ROOT\TypeLib\{DD0032DF-CEEF-4E0A-8B75-E4D8861E11E5}
HKEY_CLASSES_ROOT\Protocols\Handler\cn
Reboot and you should be able to delete the entire CommonName folder in Program Files. Finally, you can use Internet Options->Programs->Reset Web Settings to restore the normal search options.
Phew! You can stop now.
CommonName/Toolbar
First, deregister CNBabe. To do this, open a DOS command prompt window (from Start->Programs->Accessories) and enter the following commands:
cd "%WinDir%\System"
regsvr32 /u "C:\Program Files\CommonName\Toolbar\CNBabe.dll"
(Change the filename above if your Program Files folder is somewhere other than 'C:\Program Files' - for example if you are using a different drive, or a non-English version of Windows.)
Reboot and you should be able to delete the CommonName folder in Program Files.
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