The MediaUpdate.eu virus is a very harmful browser plug-in that usually comes to your computer with the aim to spread spam or junk ads. Typically, it pretends as a normal extension that silently gets added to Google Chrome, FireFox, and Internet Explorer. As long as it got a chance in, it promotes paid or affiliated downloads in the name of software updates. It keeps popping up windows provoking you to download or update some software (sometimes it could be Flash plugin, Java or Media player) for better performance. Don’t even trust it a word. Instead of accepting their request of downloading, you should take action to block them by removing this malware from your computer.