More than 20 percent of all malware removed from Windows XP SP2 (Service Pack 2) systems are stealth rootkits, according to senior official in Microsoft Corp.’s security unit.
Jason Garms, architect and group program manager in Microsoft’s Anti-Malware Technology Team, said the open-source FU rootkit ranks high on the list of malicious software programs deleted by the free Windows worm zapping utility.
For those who didn’t know, the Microsoft Malicious Software Removal Tool can be downloaded to your own computer and run locally. I’ve been recommending this more in the forum because it removes some rootkits and the backdoors/trojans that often accompany rootkits. The list of of malicious threats it removes can be found here.
Also you can try free program – RootkitRevealer