The site downnvplayer.com is related to distribution of many unwanted programs and even malware. This is why we do categorize it as dangerous. You may see its pop-ups as a result of clicking on certain spam links leading you this infected domain. However, most often such downnvplayer.com pop-ups are caused by certain nasty adware already inside of your system. This guide is dedicated to describing the danger associated with such pop-ups and helping you to remove them from your browser, as well as all other related adware.