FLV MPlayer is an ad-supported web browser plug-in (users may see additional banners, searches, pop-ups, pop-unders, interstitial and in-text links) for Internet Explorer, Firefox, and Chrome, and is distributed through various monetization platforms. during installation. FLV MPlayer is usually added when you install some other freeware (video recording/streaming, download managers or PDF creators) that had this adware bundled in its installation. When you install these free programs, they also install FLV MPlayer. Some of the programs known to bundle FLV MPlayer include “Youtube Downloader HD”, “Fast Free Converter”, “Video Media Player 1.1” and “DVDX Player 3.2”. Very often, users have no idea where it comes from, so it’s no surprise that most of them assume that FLV MPlayer is a virus.
When installed on a computer, FLV MPlayer will display banner ads on the web pages you visit, and when you browse the Internet, it will display coupons and other offers available on different websites.

The FLV MPlayer adware infection is designed specifically to make money. It generates web traffic, collects leads for other dubious sites and displays advertisements and sponsored links in your web browser.
FLV MPlayer is technically not a virus, but it has many malicious traits, such as rootkit abilities to deeply cling to the operating system, browser hijacking, and just general interference with the user experience. The industry usually refers to it as a “PUP” or potentially unwanted program.