When I go to google and click a link, different pages pop up then the link I clicked.?

When ever I go to google and type in say Yahoo! Answers, I'l click on the link but instead of bringing me to Yahoo! Answers it will open a completely different window with a web address like http://moxiesearch.com/yahoo%2banswers or http://77.91.229.143/click.php?c=dfa0193... and other random sites. The page is like when you type in like bungie.com instead of bungie.net or something and those cheap search places come up or what ever. And it takes 3 or 4 clicks on the link to actually get to the site. It's not a virus because I ran a full system sweep with Norton and it found nothing. Also alot of links wont work, like add an application on facebook and other sites. It also tookme an hour to download Itunes yesterday when it usually takes me 4 minutes to download on this computer.

Oh by the way, im not sure if I never had Internet Explorer 7 or if it deleted it but when this all started, on my facebook it said you should upgrade to Internet Explorer 7 or Mozzila or Firefox so I tried to Upgrade it to IE 7 and it said reboot to finish and I did it and nothing happened. I tried downloading it several times and it never worked.

you have some spyware that has attached to your browser(hence why one of the addresses is a straight out ip). go and run a spyware removal program like spybot S&D and maybe some avg too... might also help to remove ie 7 and reinstall it or maybe use mozilla

You have some adware stuff going on.

Make sure you have a good antivirus program and that it's working. Run a scan.

you have a virus. norton cant find it. try prevx2 or scan with hijackthis to find it.

Go to http://www.popup-remover.com
I use that program.It works very well.
Block pop-up ads and remove spyware .