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Issue: You host an SMB share on Windows 7/WS 2008 R2 & installed KB4480970 or KB4480960. When you try to connect to share from any client, you get "System error 6 has occurred"

Contrary to what you might've heard, this is an NTLM issue, not SMB.

Short thread of helpfulness:
The public KB currently:…

You will NOT have this issue if you're using Kerberos. I.e, with a Domain user that is connecting to remote share by DNS or NB name & not IP address

You won't have this issue if you are NOT a local administrator on SMB host

You will NOT have this issue if your SMB host is running Windows 8, 8.1, 10 or Windows Server 2012, 2012 R2, 2016, 2019

As you might recall, Windows 7 support ends on January 14, 2020. That's 1 year and 4 days from now. It's been 9 years since it shipped. Ahem.

Good advice workarounds:

1. Run a later OS as an SMB host
2. Don't be a member of local Administrators group on that host
3. Don't use IP address to connect to that host when you're a domain user

Bad advice workarounds:

1. Uninstall hotfix
2. Tinker with UAC token filter

I am really looking forward to the comments on this thread.
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