Worm.Win32.Netbooster (also know as Worm.Win32 or Netbooster) used to be a real virus, now fake anti-spyware software like IE Defender will display Worm.Win32.Netbooster as their scan result to trick user to buy the fake anti-spyware program. The fake anti-spyware program usually get installed onto your PC without your permission, through Trojan, malware and virus (or [...] (via)