Pat ~

Both the Yahoo Toolbar and the Google Toolbar add-ons have decent pop-up blockers, they seem to catch most pop up adds.

When I recently suffered a spyware/adware attack, I tried several programs. For me the most effective one was the free version of Webroot's Spy Sweeper.

http://www.webroot.com/downloads/

***I seemed to have to run it a few times and do some rebooting in between before everything finally seemed to be gone***

Locate it in the "Try It" section.

Also for regular check ups I use Housecall by Trend Micro

http://housecall.trendmicro.com/

And PC Pitstop has a bunch of different diagnostic tests you can run.

http://www.pcpitstop.com/

Hope one of these helps.

Roger