This will create the file myfinancial.info.gpg. Note that the original file is not deleted, so once you feel safe encrypting and decrypting files, you probably want to delete your unencrypted versions ...

Here's how to use DiskCryptor, BitLocker, or TrueCrypt to encrypt sensitive documents or even entire hard drives in Windows.

Having all your sensitive files in this encrypted container means that whenever your computer becomes infected, it cannot gather the information from what's in TrueCrypt.