Want to learn all about rootkits? Visit the site below for info on rootkits, tutorials, links and the free tool, RootkitRevealer. The description from the Sysinternals web site is below:
RootkitRevealer is an advanced patent-pending root kit 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 all persistent rootkits published at http://www.rootkit.com.