On Tuesday, Microsoft began rolling out Windows 7 KB4480970 which reportedly broke the network settings on some systems. According to various reports from forums, Windows 7 KB4480970 is causing network issues on some computers.
If you install the January 2019 cumulative update on your Windows 7 device which is on a network that uses SMBv2, you will experience unexpected network connectivity issues.
A
thread on system administrators sub Reddit revealed that the SMBv2 could not be connected anymore after installing this patch. The admins with networks using SMBv2 shares are reporting the bug.
“Jesus… 3 customers called my office this morning because they were no longer able to access their shared folders. Took me way too long to find a solution. Deleting the update KB4480970 did the trick,” a user reported in Reddit discussion.
“We’ve run into the same issue on a Windows 2008 R2 server. We also cannot authenticate with our TFS server hosted on the same box,” another user noted who later confirmed that removing the patch fixed the issues. The users have also documented the problem on Twitter.
In a thread posted on Microsoft’s TechNet forum, users are reporting that KB4480970 causes issues on the Windows 2008 R2 Server. The report also revealed that uninstalling the update fixes the problem and here’s how you can do that.
How to fix the SMBv2 issues caused by Windows 7 KB4480970• Open Windows Control Panel and navigate to Program and Features > Installed
• Updates page which lists all recently installed updates on the system.
• You can browse the listing manually and find the update KB.
• Once located, right-click it and select uninstall from the context menu.
• Windows will uninstall the update.
• Reboot PC and you’ll be able to access the network once again.
source
