Last week Microsoft released the January 2019 Patch Tuesday updates and included in the release were two updates that caused problems connecting to ntework shares on Windows 7 and Windows Server 2008 R2. On January 11th, Microsoft has released a a stand-alone update that resolves this issue. […]

from https://www.bleepingcomputer.com/news/microsoft/microsoft-releases-kb4487345-update-to-fix-windows-7-share-issues/