If you're looking for a root kit checker, use Norton Anti-virus. While I do not commonly recommend using Norton, it is very good for root kit detection. The next best one is BitDefender; it's better in basically every area except root kits.

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Dan Pemberton
Vacaville, CA

Member, First Baptist Church San Luis Obispo
Formerly ABUSA (We left, so I guess that makes us American Baptists Unleashed!)