There are many software that can encrypt files. Even though there are paid softwares but sometimes the best software is a free software. Why waste money on paid softwares when you can the same protection by using a free software? One of the most popular free and open source software is "AxCrypt File Encryption Software" @ http://axcrypt.sourceforge.net/. The software currently works perfectly with Windows 98/ME/NT/2K/XP. The software also supports AES-128 File Encryption.

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