Uhmmmm ...what could be?
Error log say:
Event description: MSSQL$MICROSOFT##WID
event ID: 18456
Login failed for user 'NT AUTHORITY\NETWORK SERVICE'. Reason: Failed to open the explicitly specified database 'SUSDB'. [CLIENT:
So after googling I found that the updates KB3148812 superseeded by KB3159706 block the logon to the db.
So folks uninstall it and restart the machine an all go well again.