-UAC is disabled.
-Running setup as Administrator.
-Tried with and without IKE service enabled
-Tried in both Ultimate 64 bit and Home Premium 64 bit

Installer first says: "Windows can't verify the publisher of this driver software".
"Don't install this driver software" or "Install this driver software anyway"

I choose the latter. Installation finishes successfully, system reboots.

Double click "VPNLogin" shortcut:

"The Novell VPN driver is not installed"
"Exiting VPN login program"

Event viewer shows the following Application log:

Faulting application name: Setup.exe_InstallShield, version:, time stamp: 0x45b1a378
Faulting module name: ISSetup.dll, version:, time stamp: 0x45e5fb47
Exception code: 0xc0000005
Fault offset: 0x0009522f
Faulting process id: 0x8d0
Faulting application start time: 0x01c9b481c86961bc
Faulting application path: C:\Users\username\Desktop\Vista_clinst\Setup.exe
Faulting module path: C:\Users\username\Desktop\Vista_clinst\ISSetup.dll
Report Id: 0ab6de50-2075-11de-9f73-000c29d97bb5