Trend Micro RootkitBuster - Anti-Rootkit Freeware: On-Demand

"Trend Micro RootkitBuster is a rootkit scanner that scans hidden files, registry entries, processes, drivers, and Master Boot Record (MBR) rootkits. In addition, RootkitBuster can also clean hidden files and registry entries."

For more information, please view readme:
http://www.trendmicro.com/ftp/documentation/readme/RootkitBusterv2.2.1014_Readme.txt

To submit suspicious files, go to this:
http://subwiz.trendmicro.com/SubWiz/Default.asp