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Solution to Cisco VPN Client Error 442 on Windows Vista

I have been having issues with Cisco VPN client since I installed Windows Vista. When I attempted to establish a VPN connection, I used to get an error 442 that read:

"VPN Client: Secure VPN Connection terminated locally by the Client.
Reason 442: Failed to enable Virtual Adapter. Connection terminated
on: MM DD YYYY HH:MM:SS Duration: 0 day(s), 00:00.00"


These seemingly random connection problems caused quite a bit of frustration and even loss of productivity. Even though I am moving on to Windows 7, I finally managed to solve the problem. Here is the solution:

Perform all the steps below using admin credentials and at your own risk

* Uninstall current Cisco VPN client installation
* Restart (even if you are not required to)
* Manually remove remnants of Cisco VPN client
- Remove the key at HKEY_LOCAL_MACHINE > SOFTWARE >  Cisco Systems > VPN Client.
- Remove the keys at HKEY_LOCAL_MACHINE > SOFTWARE > Deterministic Networks.
- Remove the keys at HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft > Windows > CurrentVersion > RunOnce > CISCOREBOOTFLAG.
- Delete these directories if the Cisco VPN Client is installed in the default directories of the Windows machine:
+ C:\Program Files\Cisco Systems\VPN Client
+ C:\Program Files\Common Files\Deterministic Networks
- Delete all the old Deterministic NDIS Extender (DNE) files:
+ dne2000.sys from %SystemRoot%\system32\drivers
+ dne2000m.inf and dne2000m.pnf from %SystemRoot%\inf
- Delete the cvpndrv.sys or cvpndrva.sys file from %SystemRoot%\system32\drivers.
- Find the CSGina.dll file in the system32 folder and rename it CSGina.old
* Restart
* Install the latest Deterministic Network Enhancer ( )
* Restart
* Install Cisco VPN Client version (remeber to run the installer as an administrator)
* Restart

Your Cisco VPN client should now work without any problems. If you continue to have issues, try setting both cvpnd.exe and vpngui.exe to run in XP SP2 Compadibility mode and as "Administrator".

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