Assuming disabling is required, the following 2 results were found.
the window panel for the Report Data containing the parameters and datasets isn't there. I spent a bit of time enabling/disabling toolbars before I found this. Open a Report solution (or have one open already?) The menu link is "report data" and it's...
external image that doesn't need credentials (such as Google's logo @ http://www.google.co.uk/images/srpr/logo3w.png) Test disabling the "Unattended User Account" and seeing if Google's logo still appears. Test browsing to your images when you are not...