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Applies to: Windows 10, Windows 8.1, Windows 8, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012
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 the SMB client and server components.
While disabling or removing SMBv1 might cause some compatibility issues with old computers or software, SMBv1 has significant security vulnerabilities and we strongly encourage you not to use it.
Disabling SMBv2 or SMBv3 for troubleshooting
While we recommend that you keep SMBv2 and SMBv3 enabled, you might find it useful to disable one temporarily for troubleshooting, as described in How to detect status, enable, and disable SMB protocols on the SMB Server.
In Windows 10, Windows 8.1, and Windows 8, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, and Windows Server 2012, disabling SMBv3 deactivates the following functionality (and also the SMBv2 functionality that's described in the previous list):
- Transparent Failover - clients reconnect without interruption to cluster nodes during maintenance or failover
- Scale Out – concurrent access to shared data on all file cluster nodes
- Multichannel - aggregation of network bandwidth and fault tolerance if multiple paths are available between client and server
- SMB Direct – adds RDMA networking support for very high performance, with low latency and low CPU utilization
- Encryption – Provides end-to-end encryption and protects from eavesdropping on untrustworthy networks
- Directory Leasing - Improves application response times in branch offices through caching
- Performance Optimizations - optimizations for small random read/write I/O
In Windows 7 and Windows Server 2008 R2, disabling SMBv2 deactivates the following functionality:
- Request compounding - allows for sending multiple SMB 2 requests as a single network request
- Larger reads and writes - better use of faster networks
- Caching of folder and file properties - clients keep local copies of folders and files
- Durable handles - allow for connection to transparently reconnect to the server if there is a temporary disconnection
- Improved message signing - HMAC SHA-256 replaces MD5 as hashing algorithm
- Improved scalability for file sharing - number of users, shares, and open files per server greatly increased
- Support for symbolic links
- Client oplock leasing model - limits the data transferred between the client and server, improving performance on high-latency networks and increasing SMB server scalability
- Large MTU support - for full use of 10-gigabye (GB) Ethernet
- Improved energy efficiency - clients that have open files to a server can sleep
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. For more information about the capabilities of SMBv2 and SMBv3 capabilities, see the following articles:
How to remove SMB v1
Here's how to remove SMBv1 in Windows 10, Windows 8.1, Windows Server 2019, Windows Server 2016, and Windows 2012 R2.
PowerShell methods
SMB v1 (client and server)
- Detect:
- Disable:
- Enable:
Windows Server 2012 R2, Windows Server 2016, Windows Server 2019: Server Manager method for disabling SMB
SMB v1
Windows 8.1 and Windows 10: PowerShell method
SMB v1 Protocol
- Detect:
- Disable:
- Enable:
SMB v2/v3 Protocol (only disables SMB v2/v3 Server)
- Detect:
- Disable:
- Enable:
Windows 8.1 and Windows 10: Add or Remove Programs method
How to detect status, enable, and disable SMB protocols on the SMB Server
For Windows 8 and Windows Server 2012
Windows 8 and Windows Server 2012 introduce the new Set-SMBServerConfiguration Windows PowerShell cmdlet. The cmdlet enables you to enable or disable the SMBv1, SMBv2, and SMBv3 protocols on the server component.
Note
When you enable or disable SMBv2 in Windows 8 or Windows Server 2012, SMBv3 is also enabled or disabled. This behavior occurs because these protocols share the same stack.
You do not have to restart the computer after you run the Set-SMBServerConfiguration cmdlet.
SMB v1 on SMB Server
- Detect:
- Disable:
- Enable:
For more information, see Server storage at Microsoft.
SMB v2/v3 on SMB Server
- Detect:
- Disable:
- Enable:
For Windows 7, Windows Server 2008 R2, Windows Vista, and Windows Server 2008
To enable or disable SMB protocols on an SMB Server that is running Windows 7, Windows Server 2008 R2, Windows Vista, or Windows Server 2008, use Windows PowerShell or Registry Editor.
PowerShell methods
Note
This method requires PowerShell 2.0 or later version of PowerShell.
SMB v1 on SMB Server
Detect:
Default configuration = Enabled (No registry key is created), so no SMB1 value will be returned
Disable:
Enable:
Note You must restart the computer after you make these changes.For more information, see Server storage at Microsoft.
SMB v2/v3 on SMB Server
Detect:
Disable:
Enable:
Note
You must restart the computer after you make these changes.
Registry Editor
Important
Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.
To enable or disable SMBv1 on the SMB server, configure the following registry key:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLanmanServerParameters
To enable or disable SMBv2 on the SMB server, configure the following registry key:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLanmanServerParameters
Note
You must restart the computer after you make these changes.
How to detect status, enable, and disable SMB protocols on the SMB Client
For Windows Vista, Windows Server 2008, Windows 7, Windows Server 2008 R2, Windows 8, and Windows Server 2012
Note
When you enable or disable SMBv2 in Windows 8 or in Windows Server 2012, SMBv3 is also enabled or disabled. This behavior occurs because these protocols share the same stack.
SMB v1 on SMB Client
- Detect
- Disable:
- Enable:
For more information, see Server storage at Microsoft
SMB v2/v3 on SMB Client
- Detect:
- Disable:
- Enable:
Note
- You must run these commands at an elevated command prompt.
- You must restart the computer after you make these changes.
Disable SMBv1 Server with Group Policy
This procedure configures the following new item in the registry:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLanmanServerParameters
- Registry entry: SMB1
- REG_DWORD: 0 = Disabled
To configure this by using Group Policy, follow these steps:
- Open the Group Policy Management Console. Right-click the Group Policy object (GPO) that should contain the new preference item, and then click Edit.
- In the console tree under Computer Configuration, expand the Preferences folder, and then expand the Windows Settings folder.
- Right-click the Registry node, point to New, and select Registry Item.
In the New Registry Propertiesdialog box, select the following:
- Action: Create
- Hive: HKEY_LOCAL_MACHINE
- Key Path: SYSTEMCurrentControlSetServicesLanmanServerParameters
- Value name: SMB1
- Value type: REG_DWORD
- Value data: 0
This disables the SMBv1 Server components. This Group Policy must be applied to all necessary workstations, servers, and domain controllers in the domain.
Note
WMI filters can also be set to exclude unsupported operating systems or selected exclusions, such as Windows XP.
Important
Be careful when you make these changes on domain controllers on which legacy Windows XP or older Linux and third-party systems (that do not support SMBv2 or SMBv3) require access to SYSVOL or other file shares where SMB v1 is being disabled.
Disable SMBv1 Client with Group Policy
To disable the SMBv1 client, the services registry key needs to be updated to disable the start of MRxSMB10 and then the dependency on MRxSMB10 needs to be removed from the entry for LanmanWorkstation so that it can start normally without requiring MRxSMB10 to first start.
This will update and replace the default values in the following two items in the registry:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetservicesmrxsmb10
Registry entry: Start REG_DWORD: 4= Disabled
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLanmanWorkstation
How To Cmd Windows 10
Registry entry: DependOnService REG_MULTI_SZ: 'Bowser','MRxSmb20″,'NSI'
Note
The default included MRxSMB10 which is now removed as dependency.
To configure this by using Group Policy, follow these steps:
- Open the Group Policy Management Console. Right-click the Group Policy object (GPO) that should contain the new preference item, and then click Edit.
- In the console tree under Computer Configuration, expand the Preferences folder, and then expand the Windows Settings folder.
- Right-click the Registry node, point to New, and select Registry Item.
- In the New Registry Properties dialog box, select the following:
- Action: Update
- Hive: HKEY_LOCAL_MACHINE
- Key Path: SYSTEMCurrentControlSetservicesmrxsmb10
- Value name: Start
- Value type: REG_DWORD
- Value data: 4
- Then remove the dependency on the MRxSMB10 that was just disabled.In the New Registry Properties dialog box, select the following:
- Action: Replace
- Hive: HKEY_LOCAL_MACHINE
- Key Path: SYSTEMCurrentControlSetServicesLanmanWorkstation
- Value name: DependOnService
- Value type: REG_MULTI_SZ
- Value data:
- Bowser
- MRxSmb20
- NSI
NoteThese three strings will not have bullets (see the following screen shot).The default value includes MRxSMB10 in many versions of Windows, so by replacing them with this multi-value string, it is in effect removing MRxSMB10 as a dependency for LanmanServer and going from four default values down to just these three values above.NoteWhen you use Group Policy Management Console, you don't have to use quotation marks or commas. Just type the each entry on individual lines. - Restart the targeted systems to finish disabling SMB v1.
How To Destroy Windows 10 With Cmd Commands
Auditing SMBv1 usage
To determine which clients are attempting to connect to an SMB server with SMBv1, you can enable auditing on Windows Server 2016, Windows 10, and Windows Server 2019. You can also audit on Windows 7 and Windows Server 2008 R2 if they installed the May 2018 monthly update and on Windows 8, Windows 8.1, Windows Server 2012, and Windows Server 2012 R2 if they installed the July 2017 monthly update.
- Enable:
- Disable:
- Detect:
Check Disk Windows 10 Cmd
When SMBv1 auditing is enabled, event 3000 appears in the 'Microsoft-Windows-SMBServerAudit' event log, identifying each client that attempts to connect with SMBv1.
Summary
If all the settings are in the same Group Policy Object (GPO), Group Policy Management displays the following settings.
Testing and validation
After these are configured, allow the policy to replicate and update. As necessary for testing, run gpupdate /force at a command prompt, and then review the target computers to make sure that the registry settings are applied correctly. Make sure SMB v2 and SMB v3 is functioning for all other systems in the environment.
Summary :
If you are suffering that Windows 10 doesn’t let you delete a file, check the 3 ways in this post for how to delete files that cannot be deleted in Windows 10 computer. Detailed step-by-step guide is provided. To recover mistakenly deleted files or lost data from Windows 10 computer or other storage devices, MiniTool offers the professional free data recovery software.
Can’t Delete a File in Windows 10?
Sometimes you may face this problem: you cannot delete a file or folder in Windows 10 no matter how many times you conduct the delete operation. How to delete files that cannot be deleted? How to force delete a file in Windows 10 computer?
Generally if a file is being opened or used by another application or program, Windows 10 computer will mark the file in a locked state, and you can’t delete, edit or move this file. When you are not using this tile, then it will be unlocked. But sometimes the file unlock process may be not successfully completed, which may cause the file delete operation can’t be accomplished, along with a warning showing that the file is opened by another program.
If you insist to delete the file or want to force to delete it, you may try these two methods in this post to unlock and delete the file.
Need to mention that this post is not talking about deleting Windows system files. Windows system files are usually protected against deletion. Deleting system files can cause issues of your Windows 10 computer OS. So please do not delete system files randomly.
If the file is corrupted or your Windows 10 computer reports that it can’t find the file, you may take some measures to conduct the disk repair process to see if it can fix this error and fix corrupted system files.
Tip:MiniTool Power Data Recovery - Clean and safe professional data recovery software enables you to easily recover any mistakenly deleted files or lost files from Windows computer, external hard drive, SSD, USB, SD card, etc. Intuitive interface and simple operation.
How to Force Delete a File That Cannot Be Deleted Windows 10
How to delete a file that that cannot be deleted in Windows 10? Normally you can take the basic steps below at first.
- Close all apps and programs on your Windows 10 computer, and try to delete the file again to see if it can be deleted.
- Close File Explorer. You can click Start -> Type Task Manager and choose Task Manager to open it -> Find Windows Explorer and right-click on it and choose End task to close it.
- Restarting Windows 10 can sometimes fix many issues. You can try to reboot your Windows 10 computer and delete the file again to see if it can be deleted successfully.
- You can also conduct a virus scan to see if there is a virus in your Windows 10 computer.
If all the four measures above don’t make any difference, then you can continue to try the two ways below to delete files or folders that cannot be deleted.
Method 1. Delete Files/Folders Using CMD
You can try to use Command Prompt to delete files that cannot be deleted in Windows 10.
Step 1. You can press Windows + R keys on the keyboard, type cmd, and press Ctrl + Shift + Enter to run Windows Command Prompt as administrator.
Step 2. Then input the command line and hit Enter to force delete the file in Windows 10 with CMD. The command line is like this: del c:usersalisadesktoptest.txt. Replace “c:usersalisadesktoptest.txt” with the path of the target file.
Learn how to create and delete a file or folder with cmd. Use Windows Command Prompt to create and delete files and directories.
Method 2. Use Safe Mode to Unlock and Delete Files
To delete a file that won’t be deleted, you can also try to start Windows 10 in safe mode to unlock and delete the file.
Step 1. Click Start -> Settings -> Update & Security -> Recovery -> Restart now (under Advanced Startup), to enter into Windows recovery environment.
Step 2. Click Troubleshoot -> Advanced options -> Startup Settings -> Restart.
Step 3. In Startup Settings window, you can press F4 or F5 to boot into safe mode in Windows 10.
Step 4. Delete the file or folder in Windows 10 Safe Mode.
Step 5. Restart Windows 10 and your computer will auto exit Safe Mode.
Learn how to open a file/folder in Command Prompt (cmd) on Windows 10. Step-by-step guide is included.
How to Recover Mistakenly Deleted Files from Windows 10 Computer
As for how to force delete a file, how to delete files that cannot be deleted or how to delete locked files in Windows 10, hope the above solutions in this post help.
In case sometimes you may mistakenly deleted a needed file on your Windows 10 computer, here we also attach an easy file undelete method, namely, use the professional data recovery software to easily recover deleted files from your Windows 10 computer.
MiniTool Power Data Recovery is an easy data recovery program for Windows. It allows you to easily recover deleted/lost files from Windows 10 computer, external hard drive, SSD, USB flash drive, SD card, etc. in 2 simple steps. You can use MiniTool Power Data Recovery to recover data under various data loss situations.
Download and install MiniTool Power Data Recovery on your Windows computer and follow the simple operation below to recover mistakenly deleted files.
Step 1. Launch MiniTool Power Data Recovery, and choose This PC from the left pane. Then you can choose the specific partition in the right window where your deleted files located. Click Scan button.
If you want to scan and recover specific type of files, you can click Settings to choose the file type before you click Scan button.
Step 2. After the scan process is completed, you can check the scan result to find your mistakenly deleted files, check them and click Save button to set a new destination path to store them.
Easy 3 steps to fast recover my files/data for free with best free file recovery software. 23 FAQs for how to recover my files and lost data are included.
How to Force Delete A File FAQ
You can follow the operation in this post to force delete the file that cannot be deleted in Windows 10 using Command Prompt.
You can use the del command in CMD to force delete a folder in Windows 10. The detailed instructions are included in this tutorial.
How do I delete a file that won’t delete Windows 10?
Check the solutions in this post above to delete the undeletable files or folders in Windows 10.
If the folders are currently used by other applications or are locked, then you cannot delete the folders. You can close all applications and try again. If it doesn’t work, you can try the 2 methods in this tutorial to force delete the folder.