Tons of posts related to Windows 10 and SMB as the root cause of the inability to connect to unRaid that were fruitless so I'm recording this easy fix for my future self.
If you cannot access your unRaid shares via DNS name ( \\tower ) and/or via ip address ( \\192.168.x.y ) then try this. These steps do NOT require you to enable SMB 1.0; which is insecure.
Directions:
Press the Windows key + R shortcut to open the Run command window.
Type in gpedit.msc and p
Exactly what have you tried? Have you watch this tutorial:
https://forums.unraid.net/topic/53172-windows-issues-with-unraid/page/4/?tab=comments#comment-741282
Have you gone through this thread (start with page 6 and work backwards)?
https://forums.unraid.net/topic/53172-windows-issues-with-unraid/
I am also assuming that you are trying to access shares when you get this message. Are your shares Public, Secure or Private?
F