My PC got spyware, adware, advertisements keep coming up on my screen, how to get rid of them?

i akready got windows defander, Yahoo antispyware, installed

My PC got spyware, adware, advertisements keep coming up on my screen, how to get rid of them?norton antivirus 2007

Try SpyBot or Ad Aware, they're both free

My PC got spyware, adware, advertisements keep coming up on my screen, how to get rid of them?product key

Do a system restore to a few days ago or longer if still there...

This will correct it...
Windows defender should do the job. Do you have it set up to scan automatically? If so, is the computer on during the time it is set to scan? I think the default time is 2:00AM. To scan now, open defender and click on scan. Adaware and Spybot are also free. Both work well but Adaware is a little easier to use.
Try FireFox.

The award-winning, free Web browser is better than ever. Browse the Web with confidence - Firefox protects you from viruses, spyware and pop-ups. Enjoy improvements to performance, ease of use and privacy. It's easy to import your favorites and settings and get started. Download Firefox now and get the most out of the Web.

http://info.sitesled.com/firefox.html