Digging into local security options I found the following three all had a status of "Not Applicable", which I have never seen before.
Accounts: Administrator account status
Accounts: Guest account status
Network access: Allow anonymous SID/Name translation
However, I can log on to the local administrator account and access the network. The first symptom that alerted me to a problem last night was Windows Security no longer recognized Symantec Endpoint is installed. Scheduled scans work but there is no Network Threat Protection tab and Live Update does not work.
When trying to click the tab for Windows Service Dependencies I get this error:
Win32: Access is denied
Could this be related to local security policy settings? Any other suggestions?