That really annoying error that won’t go away about you not being able to make config changes to WSUS as there are some already underway.

Assuming you’ve had this error for a couple of days or more then the fix is below. If you haven’t had this error for a few days then wait longer! Some processes such as changing the languages that you are downloading can take days!!

Fix:

You need to install SQL Management Studio (or SQL Express)
Then connect to the database by using the following servername:

• Server 2012: “\\.\pipe\MICROSOFT##WID\tsql\query”
• Server 2003/2008: “\\.\pipe\MSSQL$MICROSOFT##SSEE\sql\query”

Then run the following SQL query:

UPDATE tbSingletonData
SET ResetStateMachineNeeded = 0

Further Reading:
https://blogs.msdn.microsoft.com/vedvyas/2014/08/19/following-is-the-steps-to-connect-to-these-windows-internal-database-on-windows-2012-machine-this-to-access-the-wap-configuration-from-the-adfs-configuration-database/
https://community.spiceworks.com/topic/737987-wsus-server-cannot-save-configuration-because-the-server-is-still-prcoessing

https://diagnostics.office.com/#/?env=Prod
http://aka.ms/snrpublic

http://theitbros.com/config-active-directory-store-bitlocker-recovery-keys/

Which Domain Controller has authenticated me….

nltest /sc_query:DOMAINNAME

Which AD site is that Domain Controller in….

nltest /dsgetsite

https://blogs.technet.microsoft.com/filecab/2013/08/20/dfs-replication-in-windows-server-2012-r2-if-you-only-knew-the-power-of-the-dark-shell/

(Get-DfsrBacklog -GroupName "RG01" -FolderName "RF01" -SourceComputerName SRV02 -DestinationComputerName SRV01 -Verbose 4>&1).Message.Split(':')[2]

A nice description for recovering files from Shadow Copy using Robocopy.

https://chaoliu12.wordpress.com/2013/02/11/restore-files-from-shadow-copy/

For people who use the accessibility features, you can still get a free Windows 10 update.

https://www.microsoft.com/en-us/accessibility/windows

https://gallery.technet.microsoft.com/office/List-all-Users-Distribution-7f2013b2

Set-executionpolicy unrestricted
$LiveCred = Get-Credential
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://ps.outlook.com/powershell/ -Credential $LiveCred -Authentication Basic -AllowRedirection
Import-PSSession $Session -allowclobber
Connect-MsolService -Credential $LiveCred

Get-MailboxFolderPermission -Identity $Identity

1074 is the important one, but try these as well.
6005,6006,6008,6009,6013,1074,1076
http://serverfault.com/questions/702828/windows-server-restart-shutdown-history