Thank you, although we went with an alternative solution to BitLocker, this is valuable information going forward.
7 Pro (or 10 Pro) supports bitlocker just fine -- only 7 Home and 10 (non-pro) do not.
From what I have seen and tried only Enterprise version(s) supports BitLocker.
Windows 7 — Enterprise or Ultimate edition
I forgot about that - it is supported by 8 Pro or 10 Pro, but requires 7 Ultimate minimum.
Nice and I just found a way to enable it without a TPM.
I would post the link but it is from another site, am I permitted to do that here? Some sites don't like that.