I have a need for encryption software I can use with a GPT partition on a Laptop running Windows 8.1. I need to be able to encrypt the operating system drive and force a passcode or PIN at boot.
Bitlocker was my initial choice, however I am having complications with that so it isn't an option. Bitlocker works for encryption just fine, its the PIN prompt I am having issues with. I have tried (DC)DiskCryptor that also did not work. Mangles Windows 8 and needs to be repaired.
What products should I look at?