If by chance you plugged the GameCAP USB into your PC before you installed the software, Windows will automatically install the wrong drivers!!!!
If that is the case you have to delete them or it will never work! Plug the device in - go to Device Manager (Win-Pause keys) - identify the device under Sound, video and game controllers and Uninstall Device!
Now do the Short Version: (repair install)
First thing to do is to turn off your Anti Virus, Firewalls, Registry Cleaners, etc.
Unplug your RGC Device and put it aside until you are completely finished.
Now insert your Roxio Disc.
Don’t do any updates at this time (get it running first)
When you reach the screen where Repair is offered, choose that!
When the Repair completes, turn your AV & Firewall back on and reboot.
Keep you fingers crossed and this should do it