16Windows Update AgentSoftware SyncUnable to connect: Windows is unable to connect to the Automatic Updates service and therefore cannot download and install updates according to the set schedule. Windows will continue to try to establish a connection.
Just make sure that your connected to a secure and fast connection. If you're on laptop or tablet, make sure you have the strongest available signal when you attempt an update.
This code is given due to a disconnect during download of critical updates or there's no connection during a predetermined download period.