Thank you! You have provided some great advice.
Actually I think I resolved the issue. After much reading I discovered that having mixed case letters in a MySQL database can cause problems, so I started all over again with a new (all lower case) Table prefix. The WooCommerce plugin installed without a problem.
It’s a slow learning process for me. But having forum members assistance is invaluable. So thank you for your prompt reply. I hope I may be able to help other fellow travelers, when I become more experienced with this web stuff.