Backdoor:Win32/NTRoot, Trojan.Caiijing and Backdoor:Win32/Sivuxa are imaginary threats, Russians created this virus names to scare you, showing fake spyware detection popups. These popups results from Zlob trojan and this malware can damage your computer and steal sensitive data. The purpouse of Warning popup is to scare you and trick into buying full version of rogue anti-spyware [...] (via)