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Cisco VPN client over wireless causing blue screen in Vista Enterprise v 2.1e

Last Modified: 2009-04-03
We've been rolling out Vista company wide and have seen a multitude of cases where our users are connecting wirelessly to VPN and their laptops blue screen.

All laptops are HP 6910p with either 2 or 4 gigs of RAM.
All have SP1
All have Cisco Client or higher.
Most blue screens are happening over wireless, but we have had the occassional blue screen when they are connected with a net cable.

The only thing we've seen in common is IPv6 is enabled by default. Has anyone else seen this problem?
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Did you install the VPN client before or after SP1?
This one is on us!
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The Vista install came with SP1, so it was installed after. It is part of our machine image.
This one is on us!
(Get your first solution completely free - no credit card required)


We found a solution that seems to be working so far. Here are the steps:
Step 1. Login as administrator and uninstall old vpn and reboot.
Step 2. Login as administrator and install KB953270.
Step 3. Login as administrator and install KB952876 and reboot.
Step 4. Login as administrator and run Winfix with admin rights, install dneupdate.msi, and reboot.
Step 5. Login as administrator and install Cisco Vpn with admin rights and reboot.
step 6. Login as administrator and in "manage network connections" right click "properties" under
        "Cisco vpn adapter" uncheck "QOS Packet Sche" and "IPv6" and "OK".
step 7. With user login set c:\program files\cisco Systems\vpn client\cvpnd.exe and vpngui.exe
        to run in XP compatility mode with administrator rights.(administrator may not apply to everyone)
Thanks for the suggestions though!
stormy21- I just wanted to follow up with you regarding your posted solution and see how it is working for you.  Any additional findings?  Still having some/any issues?  Did you open up a case with Cisco?  What corporate AntiVirus solution are you using?


We did finally find a solution for the problem. Here are the steps we have taken:
Login as the local admin for all steps
Update the wireless driver - reboot
Install Windows6.0-KB953270-x86.msu
Install Windows6.0-KB952876-x86.msu and reboot.
Uninstall VPN - reboot
Uninstall DNE - reboot
Copy CiscoVPN5.0.03.0560, winfix.exe, and dneupdate to desktop
Run Winfix.exe, install dneupdate - reboot
Install CiscoVPN5.0.03.0560 - reboot.
Login in as the user and test.
We have had 100% success with these steps. It's a little time consuming due to all the reboots, but it works. Hope this helps anyone else out with the problem.
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