Today is the last day on Eradication Phase. The topic is "Finding and Removing Hidden Files and Directories". What are your tools or steps to detect, discover and possible recover hidden files and directories, be it on Windows, Unix or Mac OS platform?

Let share your valuable knowledge with the rest. Send to us via our contact form and we will update for everyone. Thanks.

Update:
Our reader, Greg, shares with us one of his tools he uses to fight malware on Windows: Eset Sysinspector.