As you merriley go throught the wonders of the internet..... you visit many different pages. Sometimes you get pop ups that will ask you for permission to download , mainley you will say NO. Thing is , its already tagged your PC. The programs are mainely Cydor and Gator, and that bloody Bonzi Buddy ...... if i every get him again ill murder ppl.
These proggys are "Spy Ware" and will send back reports of where you have been and what sites you have visited.
One particular nasty one is Hotbar.... you will know when you get that one cos everytime you post on here there will be something like this on your post...... <hotbarssession.4328.> or something like that.
Here are a couple of handy little programms that will seek out and get rid of spy ware.