one of my friend's told me it is a worm - definition of worm: program installs itself without your knowledge or permission
go to: http://www.kolumbus.fi/eero.muhonen/FS/Download.htm for a popup killer (freeware)
I found that freesurfer is a good popup stopper and I use spybot to remove any adware from my computer. You can download both for free and they both work great.