If you happen to see the message "Unauthorized" next to your domain network on your PC or laptop, there is an easy fix that, I've found, works most of the time.
- Open a PowerShell prompt by running at "Administrator" (If you cannot run as Administrator, you will need to get a network admin to assist you).
- Within the PowerShell window, type the following:
Reset-ComputerMachinePassword -Credential MYDOMAIN\SomeDomainAdminAccount
Whereas, "MYDOMAIN" is your network domain name and "SomeDomainAdminAccount" is an account, within your domain, that is an administrator.
Once you hit enter, reboot your PC or Laptop and you should no longer see this error.
This works on Windows 8, 8.1, 10, Windows Server 2008, 2008R2, 2012, 2012R2 and 2016.