Then you have a messed up PC!
Plugin the Roxio USB Device, use the new one that came with VHS To DVD 3 Plus. uninstall the two Roxio entries under 'sound video and game controllers'. highlight one right click on it uninstall and the two unknown in 'other devices' and reboot. Do not plug in your Roxio USB Capture device! Reboot the PC.
I would uninstall your Roxio products, NXT 7 and VHS To DVD 3 Plus, using the free Revo Uninstaller Pro in moderate mode. Reboot the PC. Link, https://www.revouninstaller.com/revo_uninstaller_free_download.html
Then reinstall NXT 7 with all programs shut down and antivirus shut down.
Now open the NXT 7 program and plugin the Roxio USB device.
We can worry about installing VHS To DVD 3 Plus later.