You do not have to restart the computer after you run the Set-SMBServerConfiguration cmdlet. Do not leave SMBv2 or SMBv3 disabled, just SMBv1. Disable SMBv2 or SMBv3 only as a temporary troubleshooting measure. This behavior occurs because these protocols share the same stack. Note: When you enable or disable SMBv2 in Windows 8 or in Windows Server 2012, SMBv3 is also enabled or disabled. The cmdlet enables you to enable or disable the SMBv1, SMBv2, and SMBv3 protocols on the server component. Windows 8 and Windows Server 2012 introduce the new Set-SMBServerConfiguration Windows PowerShell cmdlet. Here you’ll find more than one way to disable the services on both SMB server and SMB client. Remember, you have the SMB Server (or service), for creating a file share, and you have a SMB Client for accessing it. WannaCrypt ransomware worm targets out-of-date systems – Microsoft Technet Disable SMBv1 using PowerShell The exploit code used by WannaCrypt was designed to work only against unpatched Windows 7 and Windows Server 2008 (or earlier OS) systems, so Windows 10 PCs are not affected by this attack. Windows 10 is not vulnerable to the WannaCry ransomware, but it’s still recommended to disable SMB1 if it’s enabled on your system. To be blunt: SMB1 is old, not efficient, and now also vulnerable. The SMBv2 protocol was introduced in Windows Vista and Windows Server 2008, while the SMBv3 protocol was introduced in Windows 8 and Windows Server 2012. SMB1 is used in Windows XP and earlier (it’s nearly 30 years old!). The technical reference to CIFS is available from Microsoft Corporation at Common Internet File System (CIFS) File Access Protocol. Both SMB and CIFS are also available on VMS, several versions of Unix, and other operating systems.
The Common Internet File System (CIFS) Protocol is a dialect of SMB. The set of message packets that defines a particular version of the protocol is called a dialect. The Server Message Block (SMB) Protocol is a network file sharing protocol, and as implemented in Microsoft Windows is known as Microsoft SMB Protocol.
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