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I just had a quick look at Folder Lock for Windows. It has more or less the same functionality as TrueCrypt which I discussed recently. It can make folders invisible and encrypt them as well. The advantage of Folder Lock is that you don’t have to reserve space on your hard disk for your encrypted folders. It can encrypt an existing folder. However, it is not free. It costs $30.
Update: Please, also check out my review about TrueCrypt 5.
