The following procedure resolved all related issues.

Uninstall strawberry perl

Turn off anti-virus in Norton for one hour

Install strawberry perl

Install TK as described in previous posts

Turn on anti-virus

Install several modules required by my script

Run the script. Norton quarantined the same file as before. This time, I found and selected the option to restore this file and make it an exception to the anti-virus checking

Run my script successfully!!