My firefox browser is under continuous attack and is corrupted soon after I reset it. Any typing is lagging 2 seconds behind, and I cannot play video without very bad stuttering. I also am hearing spurious audio from no obvious page. I'm using Eset Nod 32, and get an Address has been blocked notice almost continuously from flash.quantserve.com/pixel.swf?. My Internet Explorer is unaffected. Any suggestions ?