The client has SMB1 disabled or uninstalled. SMB1 negotiate response received from remote device when SMB1 cannot be negotiated by the local computer. Log Name: Microsoft-Windows-SmbClient/Security This event is to show why the connection fails. When a remote server required an SMBv1 connection from this client, and the SMBv1 client isn't installed, the following event is logged. SMB1 is deprecated and should not be installed nor enabled. The local computer received an SMB1 negotiate response. This mechanism audits the use of SMBv1 and is also used by the automatic uninstaller to set the 15-day timer of removing SMBv1 because of lack of use. When a remote server required an SMBv1 connection from this client, and the SMBv1 client is installed, the following event is logged. The specified server cannot perform the requested operation. The specified network name is no longer available. For more info on resolving this issue, see: This share requires the obsolete SMB1 protocol, which is unsafe and could expose your system to attack. If you try to connect to devices that support only SMBv1, or if these devices try to connect to you, you may receive one of the following error messages: You can't connect to the file share because it's not secure. You upgrade Windows 10, version 1607 or Windows 10, version 1703 to Windows 10, version 1803 directly without first upgrading to Windows 10, version 1709.You do a clean install of Windows 10, version 1803.However, Windows will not automatically uninstall SMBv1 after 15 days in the following scenarios: This issue was fixed in Windows 10, version 1809 (RS5). Windows 10, version 1803 (RS4) Pro handles SMBv1 in the same manner as Windows 10, version 1703 (RS2) and Windows 10, version 1607 (RS1). All other behaviors from version 1709 still apply. Starting in Windows 10, version 1809 (RS5), Windows 10 Pro no longer contains the SMBv1 client by default after a clean installation. Third-party Azure Marketplace VMs may contain SMB1, contact their vendor for information. Windows Server virtual machines created by Microsoft for the Azure Marketplace don't contain the SMB1 binaries & you can't enable SMB1.SMBv1 can still be reinstalled in all editions of Windows 10 and Windows Server 2016.This means that Explorer Network can no longer display Windows computers through the legacy NetBIOS datagram browsing method. Because the Computer Browser service relies on SMBv1, the service is uninstalled if the SMBv1 client or server is uninstalled.The SMB version 2.02, 2.1, 3.0, 3.02, and 3.1.1 features are still fully supported and included by default as part of the SMBv2 binaries.If an administrator re-installs SMBv1, no further attempts will be made to uninstall it. Automatic removal of SMBv1 after 15 days is a one-time operation.An administrator must decide to uninstall SMBv1 in these managed environments. In-place upgrades and Insider flights of the Windows 10 Enterprise, Windows 10 Education, and Windows 10 Pro for Workstations editions don't automatically remove SMBv1.Windows evaluate the usage of SMBv1 client and server, and if either of them isn't used for 15 days in total (excluding the time during which the computer is off), Windows will automatically uninstall it. In-place upgrades and Insider flights of Windows 10 Home and Windows 10 Pro don't automatically remove SMBv1 initially.If the SMBv1 client isn't used for 15 days in total (excluding the computer being turned off), it automatically uninstalls itself. Windows 10 Home and Windows 10 Pro still contain the SMBv1 client by default after a clean installation.Windows 11 doesn't contain the SMBv1 server or client by default after a clean installation.Windows 10 Home and Windows 10 Pro no longer contain the SMBv1 server by default after a clean installation.Windows Server 2019 and later no longer contains the SMBv1 client or server by default after a clean installation.Windows 10 Enterprise, Windows 10 Education, and Windows 10 Pro for Workstations no longer contain the SMBv1 client or server by default after a clean installation.SMBv1 now has both client and server sub-features that can be uninstalled separately.SMBv1 has the following behavior in Windows 10 and Windows Server 2019 and later versions: Microsoft publicly deprecated the SMBv1 protocol in 2014. It was superseded by SMBv2 and later protocols starting in 2007. Since Windows 10 Fall Creators Update and Windows Server, version 1709 (RS3), the Server Message Block version 1 (SMBv1) network protocol is no longer installed by default.
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