Crypter is an uncommon way for encryption/decryption that the author likes to label as "mysterious". Because this is new, Windows Defender will flag it. Like everything here, it has been tested before posting and is clean.
Cypherix Cryptainer LE will securely encrypt your confidential data on any Windows PC, desktop, laptop, hard disk or removable drive such as a USB flash drive, memory stick with a 256-448-bit encryption method.
Fort - Cryptography Extension is easy to use file encryption software that integrates itself into the Windows file explorer allowing you to easily encrypt (and decrypt) files via the Explorer context menu and to protect them with a password.
KryptoFiler is an extremely easy to use bit of file encryption software. It allows you to quickly encrypt/decrypt very large files (in theory 14 TeraBytes - Windows limit ...), documents, and archives through major cryptographic standards.
KryptoMessage is a straightforward and easy to use text encryption tool. You will be able to effortlessly encrypt and decrypt messages, mail and conversations through cryptographic standards, including, TripleDES, Blowfish, TwoFish, Cast128, DES, Ice, Ice2, RC2, RC4, RijnDael, Serpent, Tea, Thin Ice.