Thank you for using Bitnami. Could you please answer the following questions?
Which problems did you have?
Could you please share with us a screenshot of the XAMPP Control Panel, it shows the status of the different services so in case you didn't receive any error message when starting the services, Apache is running in the 80 port. In this case, could you please access the localhost site by using an incognito window in your browser?
Apart from that, did you remove or stop all the Bitnami stacks in your system before starting the XAMPP services?