+<li>rEFInd uses the same EFI "hooks" as PreLoader. This method, however, is
+ part of an optional EFI subsystem, so in theory some EFIs might not
+ support it. For months, I knew of no such implementation, but <a
+ href="http://superuser.com/questions/615142/uefi-failed-to-install-override-security-policy">this
+ SuperUser question</a> indicates that at least one such implementation
+ exists. The board in question is old enough that it might not support
+ Secure Boot at all, though, so I'm not sure if this report indicates a
+ serious limitation or just a stray error message on a computer that
+ doesn't need this feature at all.</li>
+