[vpn-help] BSOD after uninstalling Shrew with Novell Client installed

[Matthew Grooms]

On 5/3/2010 2:33 PM, kevin shrew-vpn wrote:
> Anybody know if it would be possible to modify the uninstaller to
> provide a workaround for this? Instead of a code change, perhaps I could
> modify the uninstaller to check for a Novell installation and provide a
> pop-up if present. The pop-up could either suggest to the user to
> uninstall Novell first or instruct them to manually remove vfilter.sys
> before restarting (or perhaps via Safe Mode if it's still in use).
>
> ------------------------------------------------------------------------
> From: klmlk at hotmail.com
> To: vpn-help at lists.shrew.net
> Subject: BSOD after uninstalling Shrew with Novell Client installed
> Date: Thu, 29 Apr 2010 15:59:55 -0400
>
> Hi all,
>
> In my organization we use Novell with the Novell Client on Windows.
> After uninstalling Shrew VPN (2.1.5 or 2.1.6b7) on a Windows XP machine
> that has the Novell Client installed, the next time the machine is
> restarted, Windows will crash to a BSOD on startup. Shrew VPN uninstalls
> fine if the Novell Client has been removed first.
>
> The BSOD error: DRIVER_UNLOADED_WITHOUT_CANCELLING_PENDING_OPERATIONS
> The guilty file: vfilter.sys
>
> I had found this BSOD error in some other posts to this listserv, but
> they are related to the Deterministic Network Enhancer, which is not
> present on my machine.
>
> I also noticed that the vfilter.sys file gets left behind even during a
> successful uninstall (one that does not result in a BSOD on next boot),
> is that supposed to happen?
>
> To reproduce:
> Install Novell Client v4.91 SP5 and Shrew VPN 2.1.5 (or 2.1.6) in any
> order, then uninstall Shrew VPN and reboot.
>
> Pieces:
> Novell Client v4.91 SP5
> Shrew VPN 2.1.5
> Windows XP SP3
>

Hi Kevin,

I will try to look at this in the next day or two and get back to you. 
If for some reason you don't hear from me, please bug me about it.

Thanks,

-Matthew