I've noticed on PrestaShop forum , that many of merchants ask about disabling homepage banners attached to default-bootstrap template. It's a default theme in prestashop 1.6 .

I decided to record video about disabling these images. It's very easy. In fact, these banners are a part of default module named "theme configurator". Just go to the modules > modules tab in your back office and search for this addon. Open module configuration page and you will see there features to manage these pictures. You can upload own pictures there, change original pictures, disable these adds and you can even remove them there if you want too.