How to enable SMB1 on Windows 10


I have been bitten by this too many times, so note to self: If you are unable to connect to a network share on a new installation of Windows 10, and getting "Unspecified error 0x80004005" with a "net view \\REMOTESHARE" command, but "ping REMOTESHARE" works, then the issue is because the network share is using the ancient SMB1 protocol, and Microsoft has chosen to disable it by default on Windows 10 starting with the April 2018 Update.

There are 2 ways to re-enable SMB1:

1. GUI way
2. PowerShell way

Yes, I know SMB1 is deprecated for security reasons, but when you have working devices at home (eg. memory card on that Epson XP420 printer) that you want to get to over the network, you have very little choice!

Every time I hit this problem, I foolishly spend a few hours testing network connectivity and googling for the solution, which drives me crazy. Hopefully I remember this blog post the next time I inevitably hit the same problem again...

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