we never visited this site, and have not downloaded any software from the web.

This site keeps coming up, opening new browser or tabs without any action from us.

We have changed browsers since we understand that IE has security holes these sites may exploit, and even with firefox, this site keeps coming up every few minutes.

We have it blocked, but of course the blocker interrupts us every few minutes because this site keeps trying to come up!

Something has went as far as to corrupt all the recovery files on our machine.

The virus checker is not finding any anything to account for all this.

someone help!