ClarkF1: Thank you, I am now displaying my files in Windows Explorer with their extensions and I can edit them.
So I did edit the original Notepad file to become a PHP file. When I tried to view it with my browser, a weird thing happened: A download box opens up - giving me the option to "Open with" or "Save to disk". So instead of processing the script, it simply wants to provide it to me in file form. So I scrapped that idea.
I then saved the original file in the htdocs folder as an HTML file (since I'm getting so good with extensions :p ). When I do this, the HTML output is displayed, but not the PHP output. As if the browser is processing the HTML but not the PHP. 😕
So then I download PHPDesigner (thanks Houdini) and I copy and paste the script to a new PHP file and save it in the htdocs folder (with a slightly different name). I type the address into the browser and the same download box comes up. 😕
Any more thoughts? Thanks for all your help so far! 🙂