"After a recent update to AdAware, it started to report about:blank as a nasty. If you remove it IE creates it as soon as you open IE again. It's nothing to worry about and you can set AdAware to ignore it so it doesn't report it everytime"
Please read my first clickhere if you have about.blank. I appreciate you can ( and I do ) set the homepage to about.blank but there is another " about.blank " that you should worry about