BestCrypt Volume Encryption has a Single Sign-On option allowing the user to enter the password at boot time and then automatically be logged into his/her Windows session without entering the second password. The option only works for computers with encrypted System/Boot, because only in this case the software asks the user to enter a password at boot time.
To turn on the Single Sign-On option run the Options->Single Sign-On command. The software will ask you to enter the password for System/Boot volume first and then to enter your Windows credentials. In Windows 10 it may look like the following:
After entering Windows credentials click the OK button and the Single Sign-On option will be activated. If you reboot the computer and enter the boot time password, Windows will boot and then automatically logs you into your account.
Note: When using BestCrypt Volume Encryption's Single Sign-On feature on a system with Windows Requires users to press CTRL+Alt+Delete sign-in option enabled, the automatic sign-in process will pause and resume only after CTRL+Alt+Delete is pressed. For a fully-automatic sign-in experience, please disable the option.
More information is available here: https://www.jetico.com/file-downloads/web_help/bcve5/SingleSign-On.html