When installing xampp on Windows, you don't have to install Apache and MySQL as a service for local development.
Also skip that bitnami shit.
After install open the xampp control panel, and click start for Apache and MySQL.
Before starting Apache, close your Skype, as Skype blocks 1 or 2 ports the default xampp installation uses for Apache.
After that start your Skype again

Don't forget to start Apache and MySQL after you have restarted or shutdown your PC.
You may need to run the xampp control panel with admin privileges. You can also set up the deamons (service) for Apache / MySQL on the control panel anytime you want.
Before running WP installation, open (had to erase link) in your browser and create a database.
When asked for database credentials during WP install, enter you databse name you create with phpmyadmin, user is "root" and password is empty (for a default xampp installation).