• Win10 1709 and later are supposed to uninstall SMBv1 if it isn’t used — but 1803 doesn’t work that way

    Posted on July 21, 2018 at 06:42 CDT by • Comment in the Forums

    Many of you have read about the evils of SMBv1, one of the great Windows malware attack vectors of all time.

    Microsoft fixed much of the problem back with Win10 1709. Here’s the story, with lots of specifics:

    In Windows 10 Fall Creators Update and Windows Server, version 1709 (RS3) and later versions, the Server Message Block version 1 (SMBv1) network protocol is no longer installed by default…

    Windows 10 Home and Windows 10 Professional still contain the SMBv1 client by default after a clean installation. If the SMBv1 client is not used for 15 days in total (excluding the computer being turned off), it automatically uninstalls itself.

    But there’s a catch. Per Ned Pyle, the “uninstall if not used” feature in 1709 doesn’t happen if you do a fresh install of 1803. It also doesn’t happen if you upgrade directly from 1703 to 1803.

    Pyle also says that the latest beta versions of Win10 1809 (or whatever it’ll be called) have the same problem.

    Oh boy.

    Thx @sb

    Windows Patches/Security
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