Hi Benjamin,
I downloaded Prestashop from http://www.prestashop.com and are trying to install i localy in a VirtualBox-installation.
I'm currently running a copied version of Prestashop 1.4.8.3 on the same virtualbox, without any problem.
Tables get created without any problem but seem to be without content. I selected to have the demo products installed but the table "ps_product" is empty.
All checks on the first page of the installation was green.