Select F8 on boot-up and boot into Safe Mode.
Re-set your (wifes) password, shut down and re-boot normally (with new password). Once you are back in properly, you can re-set the password back to it's original.
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New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.