Pop Up Adverts: Most of my sites have pop up adverts. I hate them, but the sites are free, and perform an otherwise great service. If you suffer from them, and are using microsoft windows, do this:

Open Internet Explorer and go to TOOLS - INTERNET OPTIONS. Click on the SECURITY tab and click CUSTOM LEVEL. Under the first sub-heading, "ActiveX controls and plug-ins", look for "Download unsigned ActiveX controls". Choose DISABLE. Click OK. You may get a warning along the lines of "Are you sure you want to change the security settings for this zone?". Choose YES. Lastly, choose OK to get out of Internet Options.