I do have a quite similar problem mapping my Toshiba FlashAirs. After upgrading to 1709 I started getting the error 53, Rollback and/or clean installation with 1703 does work without any problems.

SMB v1 is still installed after an upgrade (15 days) as noted in MSKB:

https://support.microsoft.com/en-us/help/4034314/smbv1-is-not-installed-windows-10-and-windows-server-version-1709

Problem persists on different machines with different FlashAirs (Rev 3 & 4).

Would like to stop playing sd card jockey.... :)

1703: https://abload.de/img/flashair_v17038fjqs.jpg

1709: abload.de/img/flashair_v1709cekje.jpg

bye, para

p.s.: I wasn't sure if I should post this as an answer. But I couldn't comment as I've just registered to this board. And as this was the first occurance of someone exactly describing what happened after 1703 -> 1709 I just had to post...

I do have a quite similar problem mapping my Toshiba FlashAirs. After upgrading to 1709 I started getting the error 53, Rollback and/or clean installation with 1703 does work without any problems.

SMB v1 is still installed after an upgrade (15 days) as noted in MSKB:

https://support.microsoft.com/en-us/help/4034314/smbv1-is-not-installed-windows-10-and-windows-server-version-1709

Problem persists on different machines with different FlashAirs (Rev 3 & 4).

Would like to stop playing sd card jockey.... :)

1703: https://abload.de/img/flashair_v17038fjqs.jpg

1709: abload.de/img/flashair_v1709cekje.jpg

--

edit: Didn't look much further into the issue. My problem is "solved" by using net use letter: http://ip instead for my FlashAir cards and so far it seems to work well.