Write denied in shared folder from Win Embedded to Win 10

Question

Write denied in shared folder from Win Embedded to Win 10

A DM 1

Hi,

I need to write in a shared folder from Win Embedded (version 5.1 build 2600 SP3) to a Win10 Pro 21H1. This is working fine with a Win 7 Pro as destination but I need it to work with Win 10 Pro. I'm browsing every setting in secpol or services to see if there is something that I'm missing but maybe the community can point me a specific direction.

Here the list of what I've done so far.

The shared rights are set with a specific user but to be sure I've also tried with full permissions to everyone.
From Win 10 Pro to Win 10 Pro it's working (I only used the credentials)
It's not a password issue as I had a specific error message when I tried fake credentials on purpose.
I've enabled SMB1 and there are no restriction to NTLM.
Win 10 Pro services are the default ones.
I've contacted the product vendor but I'm not expecting any answers as it's an old and EOL product.

Do you see what I could have missed ?

EckiS 916 Reputation points

2022-06-10T15:55:27.84+00:00

so what error message do you get?
can you at least browser the share from Windows 10 and only get an error when you try to write?

when a microsoft login is used in Windows (instead of a local account), this sometimes makes problems with NAS: did you add the login credentials to the share to the Credential Manager?
A DM 1 Reputation point

2022-06-15T08:34:49.56+00:00

Hello EckiS,

First, thank you for taking some time to answer me.

From the Win Embedded part, I can't do much. I'm not allowed a real keyboard. I only have something similar to old phones (where you need to push several times the same number in order to get a letter). So the error message is not a Windows one.

The credentials used are a local account on the W10. Both everyone and the specific user are fully allowed on this shared folder.

For now and to be more free in what I do, I'm using a regular Win XP SP3 (as I understood that the Embedded version has a XP SP3 core). Once I get it to work fine, I'll try the same configuration with the Win Embedded. So, right now, I'm looping in the credential prompt whatever I use good or wrong credentials. Still, I see some sort of communication between both as the computer name is displayed in the upper part of the credential window.

I don't know if it's usefull but just in case... I can write from Win10 to WinXP. But that's not the way it should work.

2 answers

Your answer

EckiS 916 Reputation points

2022-06-10T15:55:27.84+00:00

so what error message do you get?
can you at least browser the share from Windows 10 and only get an error when you try to write?

when a microsoft login is used in Windows (instead of a local account), this sometimes makes problems with NAS: did you add the login credentials to the share to the Credential Manager?
A DM 1 Reputation point

2022-06-15T08:34:49.56+00:00

Hello EckiS,

First, thank you for taking some time to answer me.

From the Win Embedded part, I can't do much. I'm not allowed a real keyboard. I only have something similar to old phones (where you need to push several times the same number in order to get a letter). So the error message is not a Windows one.

The credentials used are a local account on the W10. Both everyone and the specific user are fully allowed on this shared folder.

For now and to be more free in what I do, I'm using a regular Win XP SP3 (as I understood that the Embedded version has a XP SP3 core). Once I get it to work fine, I'll try the same configuration with the Win Embedded. So, right now, I'm looping in the credential prompt whatever I use good or wrong credentials. Still, I see some sort of communication between both as the computer name is displayed in the upper part of the credential window.

I don't know if it's usefull but just in case... I can write from Win10 to WinXP. But that's not the way it should work.

Answer 1

Hello

Thank you for your question and reaching out. I can understand you are having issues related to writing files on Shared folders from Windows Embedded .

Disable password protected Sharing.
Please try to access shared folder using net use command
net use s: \<server add>\sharename /user:username
Please IISCrypt.exe to Enable TLS1.0 and SSL1.0 or Legacy versions.
Disable any Antivirus program or Windows firewall you may have for temporary purpose.
Change Registry

HKEY_LOCAL_MACHINE\Comm\SecurityProviders\NTLM

SendLMResponse DWORD value to 1

References :
https://support.microsoft.com/en-us/topic/-access-denied-or-other-errors-when-you-access-or-work-with-files-and-folders-in-windows-219af563-1953-ab4a-f17e-b0182755214e

https://support.microsoft.com/en-us/topic/fix-a-windows-embedded-compact-7-based-device-that-you-connect-to-a-windows-based-computer-cannot-access-an-smb-share-folder-59a78a13-0d22-c530-abda-96f93c35b8e5

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--If the reply is helpful, please Upvote and Accept as answer--

A DM 1 Reputation point

2022-06-15T12:14:54.597+00:00

Hi LimitlessTechnology-2700,

Thank you for this list. As I've limited acces to the specified Win Embedded hardware (restricted area and dedicated clearance needed) I'm working with a Win XP SP3 as a workaround. When it'll be working, I'll go again to try this in real conditions. Some of your recommendations aren't compatible with the security needed for this project but in order to make it work, I'll try anything and see later what I can do about security.

I've done it without any change.

Connecting directly with \host-IP\SharedFolder or by mapping it leads me to a looping credentials window (regarless of good or bad cred).

Didn't know this tool. Thanks for sharing.

First thing I've done.

I've done this through gpedit as I don't find it in regedit (exclusive to Embedded ?). I've also extented the encryption protocol allowed as AES doesn't seem to be supported by Win XP. My understanding of Kerberos is limited. Is it used even outside domain ?

Answer 2

A DM 1

I've tried this solution without result.

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Write denied in shared folder from Win Embedded to Win 10

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