Cisco VPN Client Windows XP

[upjo]

I have a problem getting the Cisco VPN Client (4.0.2D and previous version).
I am running XP pro.
When installing the client the installation program gets stuck on VAinstaller.exe. I have managed to get this to install by running msconfig and starting with only basic services (which totally messes up your system, so I found to my cost!).
When I run the connection I get the error that the client has disconnected from the host as it it no longer responding.
I have a windows 2000 machine next to me, and it works fine and I know other users who have XP pro and that works fine.
I did have Zone Alarm but that is now removed (as are numberous other programs to try and find a solution), but no joy.
Any ideas?

 

[primate]

Daft question maybe - but the installation program tries to install two non WHQL certified drivers, you haven't got the driver installation policy set to block for none WHQL drivers by any chance?

 

[upjo]

Its set to default (warn).
I'm wondering if the XP advanced networking pack is messing it up, but if I go to uninstall this it gives me a long list of what may not work if I proceed.
I have tried to install the same clients at home on a w2k server box and get the same error.
I think maybe it depends on the weather the day I install it?