Internet Explorer Web page Authentication Error

My name is plume. I have a hobby of internet surfing.  So, in this case I visit  many websites daily.

A few days ago I updated my IE from 6.0 to 8.0 from that day onward whenever I visit a site Explorer pop-ups with the message as in the image to lower my security level to visit the sites normally or add it to trusted site.

Content within this application coming from the website listed is being blocked by internet Explorer Enhanced Security Configuration.

If you trust this website, you can lower security settings for the site by adding it to the trusted site zone.  If you know this website is on your local intranet, review help for instructions on adding the site to the local intranet zone instead.

I want to know that how can I reduce my security settings of Internet Explorer so that next time if I visit any site it doesn’t ask me to add it or not as in the image pop-up.  Because I don’t have much time for adding each and every site to trusted sites, all sites I visit are trusted but still the security settings don’t allow any site to be visited directly.

Please be brief in your reply for solution.

Thanks.