Why do I get all these stupid ads only on this computer?

[Felecia Burgett]

I never get these ads on my laptop (which is getting fixed right now) or on the school's computers, and this desktop didn't used to have them. I removed all the extra toolbars and things that I thought might cause it and went to Tools > Add-ons > Extensions and disabled everything I could. THEY ARE STILL THERE.

They show up as this little magnifying glass looking thing over every image on a page, such as on Tumblr, and when you wave over the image (such as, to click on a youtube vid) it takes you to the advertiser's site. As well, there are adds running alongside youtube videos that i am watching (not the ones in the video that precede the video) that MAKE SOUND WHILE I AM LISTENING TO MY VIDEO.

Please. help. How do I get rid of these stupid things????????? It's really hard to do anything on this computer.
Right, I uninstalled a bunch too.

[RandomPerson]

Just because you disabled the tool bars etc, doesn't mean they are gone, it means they are disabled...

1. Start
2. Control Panel
3. Uninstall a program
4. Find un-necessary software (smiley toolbar or whatever)
5. Un-install.

[Joshua]

This is because you disabled the tool bars etc, doesn't mean they are gone, it means they are disabled...