There are almost new kinds of virus, malware or spyware every day, both on computers but also on mobile phones where it’s increasing.
Now there is a Rootkit around by the name Win32/Popureb.E which goes deep down to the Master Boot Record ( MBR ) and hides there so it is impossible to get rid of it since all the security and cleaner applications we use does not go that deep.
An engineer by the name Chun Feng from Microsoft states as follows: “If your system does get infected with Trojan:Win32/Popureb.E, we advise you to fix the MBR and then use a recovery CD to restore your system to a preinfected state” The rootkits are mostly used to hide follow-on malware such as banking password-stealing Trojans. Also, rootkits aren’t a new phenomenon on Windows.
Back in 2010 there were a rootkit by the name Alureon, which infected Windows XP machines and crippled the machines after the installation of a Microsoft Security Update.