This article describes how to enable and disable Server Message Block (SMB) version 1 (SMBv1), SMB version 2 (SMBv2), and SMB version 3 (SMBv3) on SMB client and server components. If you disable or remove SMBv1, you might encounter compatibility issues with old computers or software. SMBv1 has significant security vulnerabilities, and we strongly encourage you not to use it. SMBv1 isn't installed