upgrading CMN to 3.9.0.1 from 3.8.13

We are upgrading CMN to 3.9.0.1 from 3.8.13. I've below clarification

1) While running the setup, should the Quest Co-existence manager Services in services.msc be running or should it be stopped?

2) Upgrade & installation instructions in Release notes states:- Unbind the default website from ports 80 and 443 - what is this?