Microsoft will disable the SMB1 client in Windows this year

Microsoft announced plans to disable SMB1 (Server Message Block) in Windows this week. The SMB1 protocol was created at IBM in 1983 and Microsoft began dropping support for the product in 2017 with the release of the Fall Creators Update for the company’s Windows 10 operating system.

Microsoft stopped installing the SMB1 server service on all editions of Windows at this time, but left the SMB1 client service installed on the Windows Home and Pro editions. Support was not removed from these editions because Microsoft wanted users of these versions of Windows to connect to “the vast fleet of third-party consumer and small business NAS devices” that only supported SMB1.

Clients would automatically remove SMB1 after 15 days of uptime if no outbound use of SMB1 was detected. Microsoft stopped installing support for the SMB1 client in Pro editions with the release of Windows 10 version 1809. The latest Windows Insider Dev Channel builds also have the SMB1 client disabled in Home editions.

Although the SMB1 client is no longer installed by default, it is still part of the operating system. Older versions of Windows that have it installed remain installed after upgrades, and administrators can also install the client on devices.

This means that there is no longer any edition of Windows 11 Insider that has some part of SMB1 enabled by default. This will also be the default behavior in the next major release of Windows 11. As always, this does not affect in-place upgrades from computers where you have already used SMB1. SMB1 isn’t gone here, an admin can still reinstall it on purpose.

Microsoft plans to remove SMB1 binaries from future versions of Windows. Windows client and server editions no longer contain the necessary drivers or DLL files and consequently connections that require SMB1 will fail.

Organizations can install an “unsupported out-of-band installation package” to restore SMB1 functionality to “connect to legacy factory machines, medical equipment, consumer NAS, etc.”

Check, uninstall or install SMB1 right now

Windows users who don’t need SMB1 may want to disable the technology if it’s still enabled on their devices.

Windows users can uninstall or install the SMB1 client on their devices as follows:

  1. Use the Windows-R keyboard shortcut to open the runbox.
  2. Type optionalfeatures and press Enter to load the Turn Windows features on or off configuration window.
  3. To uninstall SMB1, uncheck “SMB 1.0/CIFS File Sharing Support” and click “OK”.
  4. To install SMB1, check the setting and click OK.
  5. Windows displays a “Searching for required files” window. Click Close once this is done.
  6. A restart is not required.

Now you: has SMB1 been enabled or disabled on your devices?

summary

Microsoft will disable the SMB1 client in Windows this year

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Microsoft will disable the SMB1 client in Windows this year

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Microsoft announced plans to disable SMB1 (Server Message Block) in Windows this week.

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Martin Brinkman

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Ghacks technology news

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