Windows 10 File Encryption - TrueCrypt lives on as VeraCrypt

In Window 8/10, Bitlocker implementation removed Elephant diffuser as part of the block encryption algorithm, and has been criticized to be weaker and subject to attack!  "[The Elephant diffuser is] not FIPS compliant, so certain companies and government clients can’t use it,” according to Micah Lee, The Intercept_. 
Alternatives follow; 

TrueCrypt is a discontinued source-available freeware utility used for on-the-fly encryption (OTFE). It can create a virtual encrypted disk within a file or encrypt a partition or (under Microsoft Windows except Windows 7/8 boot drive with GPT) the entire storage device (pre-boot authentication).

On 28 May 2014, the TrueCrypt website announced that the project was no longer maintained and recommended users to find alternative solutions. Though development of TrueCrypt has ceased, an independent audit of TrueCrypt has concluded that no significant flaws are present.

VeraCrypt is the success to TrueCrypt, and is best to open source solution for an encrypted file container. It's being actively support, is FIPS compliant and has 10 releases so far and supported for Windows 10.

 Plausible deniability is maintained, by creating an hidden volume, which requires a separate password to reveal it.