Oh, thank you a thousand times. I've been wrestling all day with getting port 80 free. Tried everything that I found on the chat rooms, forums, including the regex edit above, and still there was:
netstat -ano -p tcp | findstr LISTENING
TCP 0.0.0.0:80 0.0.0.0 LISTENING 4
TCP 0.0.0.0:445 0.0.0.0 LISTENING 4 etc.
Now port 80 has disappeared from the display. What a relief!