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Registry service subkey already exists
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Registry service subkey already exists. Unable to access services subkey
and registry.
On a computer that already has one 3COM 3C509B PCMCIA network interface card (NIC) installed, if you attempt to make the
computer multihomed by installing another identical NIC, the following error message is displayed:
Registry service subkey already exists. Unable to access services subkey and registry.
As a result, you cannot install a second 3c309B PCMCIA NIC.
Cause
Solution
1. Install the MS Loopback Adapter by using the Network tool in Control Panel.
2. Restart the computer.
3. Remove the first 3COM 3C509B driver.
4. Run Regedt32 and delete the 3COM key entries under the following two locations:
HKLM\System\CurrentControlSet\Services\Elink3 HKLM\Software \ Microsoft\Windows NT\CurrentVersion\NetworkCards
NOTE: There will be one number (1,2,3,...) for each adapter installed. Open each numbered key, and delete the key that
contains the 3COM card information.
5. Restart the computer.
6. Install the first and second 3COM 3C509B cards by using the Network tool in Control Panel.
7. Delete the MS Loopback Adapter.
8. Restart the computer.
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