09-Sep-2025 Patch Tuesday seems to have broken network access from W10 to WNT V4.00 systems \ VOGONS

09-Sep-2025 Patch Tuesday seems to have broken network access from W10 to WNT V4.00 systems

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First post, by red-ray

Posted on 2025-09-10, 14:28

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Since installing the latest Windows 10 09-Sep-2025 update I have been unable to access my Windows NT V4.00 SP2 + SP6a systems, has anyone else seen the same issue and/or know of a fix please?

file.php?id=226469

Ping works , but such as DIR \\RG2\SIV fails. I have also seen NetName Deleted (ERROR_NETNAME_DELETED) reported.

file.php?id=226472

When I used Windows 7 SP1 or W10 without the 09-Sep-2025 update all worked OK.

At the moment I can copy files from W10, but can't push files from W10 to NT4.

Last edited by red-ray on 2025-09-13, 15:12. Edited 1 time in total.

Reply 1 of 12, by konc

Posted on 2025-09-10, 14:52

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The patch includes fixes in both NTLM and SMB, so I'd say it's a very probable cause for your issues.
Did you check if it did something totally silly, like arbitrarily disabling SMB or changing your settings?

Reply 2 of 12, by Grzyb

Posted on 2025-09-10, 15:10

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The problem may be similar to my problem with Windows 11 vs. Samba - Re: Windows for Workgroups TCP/IP Disk

Nie rzucim ziemi, skąd nasz root!

Reply 3 of 12, by red-ray

Posted on 2025-09-10, 17:09

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Grzyb wrote on 2025-09-10, 15:10:
The problem may be similar to my problem with Windows 11 vs. Samba - Re: Windows for Workgroups TCP/IP Disk

Thank you, I did the Set-SmbClientConfiguration -RequireSecuritySignature $false and still get the issue even after a reboot of this W10 system.

Is there something in that thread I have missed please?

Reply 4 of 12, by maxtherabbit

Posted on 2025-09-10, 17:21

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Just tried my win 10 machine which also updated, can no longer connect to a WfW 3.11 share which was working previously

Reply 5 of 12, by Horun

Posted on 2025-09-10, 17:33

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Thanks for the info ! Does it effect connecting to XP ? Will set my W10 updates paused until you guys figure it out 😀

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 6 of 12, by red-ray

Posted on 2025-09-10, 17:50

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Horun wrote on 2025-09-10, 17:33:
Does it effect connecting to XP ?

I doubt it as it's OK with \\ALF, my Windows 2000 Alpha system, that said I have not tried it.

I am going to do dism /online /Remove-Package /packagename:Package_for_RollupFix~31bf3856ad364e35~amd64~~19041.6332.1.15 which should remove it.

file.php?id=226479

Last edited by red-ray on 2025-09-10, 18:10. Edited 1 time in total.

Reply 7 of 12, by Grzyb

Posted on 2025-09-10, 18:05

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red-ray wrote on 2025-09-10, 17:09:

Thank you, I did the Set-SmbClientConfiguration -RequireSecuritySignature $false and still get the issue even after a reboot of this W10 system.

Is there something in that thread I have missed please?

You haven't missed anything - I only meant that one single post.
So I guess the problem is different...

When I've set it back to "Set-SmbClientConfiguration -RequireSecuritySignature $true", I get the following when trying to access a Samba share:

The attachment error.png is no longer available

Nie rzucim ziemi, skąd nasz root!

Reply 8 of 12, by red-ray

Posted on 2025-09-10, 18:25

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file.php?id=226477

Grzyb wrote on 2025-09-10, 18:05:
You haven't missed anything - I only meant that one single post. So I guess the problem is different...

Thank you and it looks like it is. After I did the remove things are working again and I can now easily push changed SIV files to my PowerPC system and build SIV32P.exe .

file.php?id=226480

Reply 9 of 12, by Horun

Posted on 2025-09-10, 21:48

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red-ray wrote on 2025-09-10, 17:50:

Horun wrote on 2025-09-10, 17:33:
Does it effect connecting to XP ?

I doubt it as it's OK with \\ALF, my Windows 2000 Alpha system, that said I have not tried it.

Thanks !

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 10 of 12, by red-ray

Posted on 2025-09-11, 11:45

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Has anyone managed to access Windows 2000 + Windows NT 4.0 systems from Windows 11 and if so what was required to so this please?

I have just tried after the latest W11 patch Tuesday changes and neither work, but WXP does. Windows 2000 thinks the password is incorrect when it isn't and Windows NT4 is not even seen.

I obviously have SMB 1.0/CIFS + SMB Direct installed and set HKLM\System\CurrentControlSet\Control\Lsa LmCompatibilityLevel to 1

file.php?id=226545

All 3 systems were accessible from this W10 system.

file.php?id=226546

Reply 11 of 12, by jakethompson1

Posted on 2025-09-13, 21:32

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I ran into this and per the log in eventvwr, it seems it only tries port 445 connections now--explaining why Windows 2000 works but some of the earlier platforms don't