Click on "Tools" (towards the top), internet options (down at the bottom), content advisor (in the middle of the pop up window), enable (inside content advisor), (check to make sure the slider in the middle is set at none).
You can also try in that same thing "internet options", the second tab over is "security". Click on where it says restricted sites, and right below it should be an icon for "sites". Click on that and make sure
www.rollitup.org is not on there.
Something has to be changed in order for it not to work. If that don't do it, you can always do the remove internet explorer and then go back to the windows website and download it again with a fresh copy. Sometimes it's easier to start over then try to hunt for exactly what is wrong.