• Antirootkits
• System tools
• Update tools

BlackLight

BlackLight is a tool that helps you identify and destroy Rootkit code on your system, ensuring none of your precious resources are used up by these elements.

http://www.f-secure.com/blacklight

RootkitRevealer

RootkitRevealer is an advanced rootkit detection utility. It runs on Windows NT 4 and higher and its output lists Registry and file system API discrepancies that may indicate the presence of a user-mode or kernel-mode rootkit. RootkitRevealer successfully detects many persistent rootkits including AFX, Vanquish and HackerDefender

http://technet.microsoft.com/en-us/sysinternals/bb897445.aspx

GMER

GMER is an application that detects and removes rootkits .

http://gmer.net