speller wrote:I have a fresh install of xampp using xampp-win32-7.0.9-1-VC14-installer.exe
I adjusted the apache port to use 8088
This already is a bad idea, do not change Apache ports, instead find out, which Software occupies the standard HTTP Port (which is Port 80).
speller wrote:If it gets complicated I'll try installing drupal manually.
Yes! Most of the Bitnami installers already installs a full web environment, which finally collides with the Xampp installation (maybe this the reason, why you did change Port to 8088). Therefore i do NOT recommend to install BOTH Xampp and the Bitnami Drupal Installer. If you like to run Xampp, download Drupal from Drupal and install it as usually on webservers.