Hello again, new friends. Of the three programs suggested, ImgBurn achieved the task best, successfully burning the Ubuntu .iso file for installation.
Now, with Ubuntu installed and successfully humming on that old machine, I need anti-virus protection. I use Kaspersky on my main machine. I had used the U. of Michigan's free McAfee on the old machine, but they no longer support or make available that program for what used to be a Win98 machine. Are there any freeware or shareware programs available and suggested for use with Linux?