remove defend search

If Defendsearch.com started to appear when you open your browser and new tab, that would be a result of a browser hijacker getting installed on your machine. A browser hijacker is a type of malware used for advertising purposes making users visit specific sites time and again. By the way, it is worth noting that manual removal is not sufficient for this type of infection since it intends to leave some files behind so that it can be re-launched anytime.