Server Message Block

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SMB - https://en.wikipedia.org/wiki/Server_Message_Block

Disable v1 - https://support.microsoft.com/en-us/help/2696547/how-to-enable-and-disable-smbv1,-smbv2,-and-smbv3-in-windows-vista,-windows-server-2008,-windows-7,-windows-server-2008-r2,-windows-8,-and-windows-server-2012


OS Disable Client Disable Server
Win7 sc.exe config lanmanworkstation depend= bowser/mrxsmb20/nsi

sc.exe config mrxsmb10 start= disabled

Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters" SMB1 -Type DWORD -Value 0 -Force
Win8+ see win7 Set-SmbServerConfiguration -EnableSMB1Protocol $false


fully remove on 8.1+

  • Server: Remove-WindowsFeature FS-SMB1
  • Client: Disable-WindowsOptionalFeature -Online -FeatureName smb1protocol