SureCrypt is a very simple security utility so simple and basic that it doesn't even require installation. In addition, it is completely free and of a tiny weight (just 9 Kb).
With SureCrypt you can encrypt and decrypt all kinds of texts, so that nobody can access their contents unless they know the password you have set.
In addition, it is very interesting for programmers that on the author's website you can find the C source code of how this program is made.
You can free download SureCrypt 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.