WSUS Server 2012 will not download updates

Everything was working fine for about 9 months, now it syncs successfully, but will no longer download the updates.  So the clients all show no updates available.  I have already run the reset and blew the WSUSContent folder away.  Below is the error in the event log.

Event ID 364
Content file download failed.
Reason: The operation being requested was not performed because the user has not logged on to the network. The specified service does not exist. (Exception from HRESULT: 0x800704DD)
Source File: /d/msdownload/update/software/defu/2016/06/am_engine_c27a4fbbbf4950359fd2f16e3be5e3714aa1ad5b.exe
Destination File: D:\WSUS\WsusContent\5B\C27A4FBBBF4950359FD2F16E3BE5E3714AA1AD5B.exe
Who is Participating?
cshepfamConnect With a Mentor Commented:
I had an issue similar to this and it came down to a Windows update affecting the whole machine.

Two updates I would recommend removing are the following:

KB3161606 and KB3139923

Check to see if you have those and remove them then reboot and see if your issue goes away
pcservneAuthor Commented:
OK - I changed the logon for the Update Services to Network Service and now I don't get any errors in the event log, but it still won't download any updates.  No proxy server.  Sonicwall firewall hasn't changed.
pcservneAuthor Commented:
I removed those updates, but will have to wait for a down period to reboot the server.
pcservneAuthor Commented:
Removing those 2 updates wasn't all it took.  I also had to do a full reset on WSUS with a couple IISRESETs and reboots mixed in.  Probably would have been faster to uninstall/reinstall.
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