I have a Toshiba L55 Laptop and I just upgraded to Windows 10 Pro (from Windows 7 Pro).
Before trying to enabling BitLocker, I opened Group Policy (GPEDIT.msc)/Computer Configuration/Administrati
ve Templates/Windows components/BitLocker Data Encryption/Operating System Drives/Require additional authentication at startup and selected "Enabled" and made sure that the checkbox for "Allow Bitlocker withouta compatible TPM (requires a password or a startup key on a USB flash drive)" is checked and rebooted several times.
However I still get an error message. I have done this on many Windows 7 PCs and one Windows 10 desktop PC. But for some reason this laptop does not work.
Can you help?