aswMBR is a anti-rootkit scanner that searchs your computer for Rootkits that infect the Master Boot Record, or MBR, of your computer. This includes the TDL4/3, MBRoot (Sinowal), and Whistler rootkits. For this program to properly work it must first download the Avast virus definitions, so you will need an active Internet connection before using it.
TDSSKiller is a utility created by Kaspersky Labs that is designed to remove the TDSS rootkit. This rootkit is know under other names such as Rootkit.Win32.TDSS, Tidserv, TDSServ, and Alureon. TDSSKiller will also attempt to remove other rootkits such as the ZeroAccess or ZeroAccess rootkit if it is detected.
Trend Micro RootkitBuster is a program that will scan your computer for Rootkits. This scanner will scan for rootkits that are using the latest technology including Master Boot Record (MBR) infections.