Wincrypt Description:

Wincrypt enables users to encrypt (lock) and decrypt (unlock) any type of file, folder or email attachment so that it becomes unreadable to anyone without the password.
Hide files from people you share your computer with.
Email confidential documents
Protect your backups (that are stored on removable media).
Protect documents over a network
Protect your files from thieves

Awarded 5 stars by Computer Active:
Occasionally, we stumble upon software that just works - no fuss, no vertical learning curve, no ploughing through pages of jargonese. Wincrypt is one such program. If privacy and security are issues for you, this is as good as it gets.
Kyle MacRae - Computer Active Magazine - January/February 2003