I've found so far that the easiest way to eliminate the flashing banner ads and pop ups (without installing an ad or pop-up killer) is as follows:
If you're using Internet Explorer:--Go to the "Tools" pull down menu.
--Select "Internet Options"
--Click on the "Security" tab
--Select "Restricted Sites" then click on "Custom Level"
--Disable ALL Javascript, ActiveX, and Cookies (even per-session cookies). Basically Disable anything it lets you disable.
--Click "Ok".
--Click on the "Sites" button.
--Add the following sites:
mediamgr.ugo.com
image.ugo.com
(The above are important for UGO sites, all the following are for other common ones)
*.x10.com
*.admonitor.com
*.admonitor.net
*.bonzi.com
*.clickagents.com
ad.doubleclick.net
ads.msn.com
*.spylog.com
*.valueclick.com