I've updated a S905X box to version 8.1.1 and I'm having SMB problems, I can't access to my Windows shares.
As other users have reported, I think the problem lies in having a free access in Windows, without user/password.
I wonder if it's planned to solve this in future releases (it works perfect in older versions).
Otherwise, the update was easy, no problem at all. Thanks a lot for your work.
Its probably due to a recent update in windows that disabled SMBv1. Control panel, programs and features, add windows features -> look for SMBv1 server and add it. That should re-enable it.