Navigation.iwatchavi.com is website that is used by various browser adware for displaying ads and pop-ups. It can be caused by various unwanted applications like NowUSeeIt Player, Qksee, WebDiscover and others. Such applications may install extensions in Google Chrome, Mozilla Firefox and Internet Explorer and show various advertisements including Navigation.iwatchavi.com.
searchinterneat-a.akamaihd.net is website or web-pages used to deliver ads, redirects and pop-ups in your browsers. In some cases it hijacks your search engine settings. It is used by various advertising networks and adware developers. Basically, of you see searchinterneat-a.akamaihd.net redirect it means you have adware installed on your computer. It can have different names or versions (for example Results Hub).