At this time, there are no real photos or videos of a dead Osama Bin Laden. These are Internet scammers trying to infect your computer with a virus or spyware. Please do NOT:
Download anything
Click on any picture file
Click on any video file
Click on any link
that purports to show a dead Osama Bin Laden. Please click on the safe link below for an excellent article detailing this issue and shows what some of the scams look like.
http://blogs.mcafee.com/mcafee-labs/5-4-3-2-1-osama-bin-laden-death-scams