For the record I’ve gotten many random crashes (blue screens) when using Comodo and Cisco VPN together. Without Comodo (just Windows firewall) but using Cisco VPN – no crashes. Without Cisco VPN (regular windows VPN) but using Comodo – no crashes. But combine the two, and crashes occur all the time.
I am using Vista 32 Business, on an Lenovo X61 tablet.
What version of the VPN Client are you using ?
There are still a lot of bugs in the 5.x version for Vista i had problems with standby and Cisco vpn guaranteed BSOD.
What’s your definition of a crash ? Does is blue screen/BSOD do you have a minidump maybe you can attach it so we can run it trough windebug to see the possible cause (vpn or comodo driver).