Comment 3 for bug 1184297

So http://mjg59.dreamwidth.org/24869.html explains why you needed to pull the hard drive. It does not explain why you would get an error about security policy. Can you attach the output of the following three commands on the affected machine:

sudo efibootmgr -v
od -tx1 /sys/firmware/efi/efivars/SecureBoot-8be4df61-93ca-11d2-aa0d-00e098032b8c
od -tx1 /sys/firmware/efi/efivars/SecureBootEnforce-59d1c24f-50f1-401a-b101-f33e0daed443

It is also potentially useful to have the contents of these files attached:
/sys/firmware/efi/efivars/KEK-8be4df61-93ca-11d2-aa0d-00e098032b8c
/sys/firmware/efi/efivars/db-d719b2cb-3d3a-4596-a3bc-dad00e67656f