[Computer] Still Another Failed Attempt to Install Logitech Digital IO2 Pen Software

I turned off everything I could find, including Norton Anti-Virus 2004 and
CounterSpy. I still get the exact same error from the Logitech installer
that it cannot write to my computer?s registry. Time to start sending
queries to Logitech?s support line (likely a futile exercise from what I
have read, but I have to give it a try or just admit defeat and return their
uninstallable product).