If you do many searches on google investigating the case of Joe Stack and the Austin crash you will find yourself running in to malware and viruses set up along your path. Try googling "echelon building tenants austin" and you get something like this:

or sometimes like this:

If you click on some of the middle ones you get a virus or malware program of some sort which requires a bit of clicking to get rid of. It might look like this:

After which some program begins doing something. A few clicks and it's gone however.
Other times searching for similar Joe Stack and Austin crash or echelon related info I got a virus program that looked like this:

If you have also been having these problems, leave a comment. I have never had this particular problem before and so I took notice of it, especially after I found someone else complaining about it on another board doing 'Stack' research.
Any computer experts out there might have a better idea about it then I.