KB4487345 löst das Netzwerkproblem mit SMB, das nach der Installation von KB4480970 und KB4480960 entstanden ist.
This update resolves the issue where local users who are part of the local “Administrators“ group may not be able to remotely access shares on Windows 7 SP1 and Windows Server 2008 R2 machines after installing the January 8th, 2019 security updates. This does not affect domain accounts in the local "Administrators" group.