Bob, there wasn't really anything solid in that link.
No smoking gun per se.
But, it did confirm that a lot of other people with Vista Ultimate are experiencing this problem.
I searched in 2 other sites and the same thing. A bunch of people experiencing the same problem, but no one really having a solution.
Finally I came upon this site whereby as per the comments from various people, there IS a solution that actually works:
http://www.online-tech-tips.com/computer-tips/usb-device-not-recognized/The next time I go to my sister's place, I'll suggest this.
Of course, for them it's NOT a problem because they don't use Flash Drives. So, they weren't even aware there was a problem.
It doesn't surprise me that my sister's computer could have gotten its USB Ports glitched up to where they don't recognize Flash Drives. My sister and her husband are NOT Fans, NOT believers of periodically Rebooting their computer, much less actually powering it down periodically. I've tried to get them to do this periodically, but have had no success. I've told them that App remnants can be accumulating in RAM as certain Apps don't always release the entire RAM they were using. But, nope. I'm sure they haven't rebooted that computer since they got it several months ago, much less powered it down.