Hi,
Windows 11 Home 24H2 has broken access to my QNAP TS-653A on two different laptops.
At the command line I use:
net use M: “\192.168.1.xxx\Folder” /user:“user.name” password
Or in Windows explorer I use:
Map Network Drive, Connect Using Different Credentials and enter the above
Whichever one I use, I can access the folders and files from the command prompt (I can copy files, I can play videos in VLC, etc etc), but attempting to access the M:\ drive from Windows explorer just gives “M:\ is not accessible. The specified server cannot perform the requested operation.”
Everything is still working fine on a Windows 11 machine that’s still on 23H2, and a Windows 10 machine.
I have tried everything I can find online…
Enabled SMBv1 using PowerShell: Detect, enable, and disable SMBv1, SMBv2, and SMBv3 in Windows | Microsoft Learn
Checked all services are running: Fix: Mapped Network Drive Not Showing in Windows 11 | Password Recovery
Carried out step 8 here (from a link in the old forum) : accessing-a-third-party-nas-with-smb-in-windows-11-24h2-may-fail/4154300
The steps “worked” in so far as SMBv1 is now enabled, the services are now running, and the commands in step 8 appeared to work. I rebooted after each and re-checked. I do also realise that most of these steps are a very bad idea security-wise.
But I still get exactly the same error when trying to access my NAS from Windows Explorer. None of these steps have fixed the problem.
My NAS is now useless with these laptops.
What else can I try? Any ideas? I can’t roll back to Windows 11 23H2.
Thanks for any help anyone can give.
Cheers,
David.
A TS-653A does not run SMB v1 by default, so if you enabled SMB1, it would not change anything.
What are your SMB advanced settings on the NAS? (best post a screenshot)
Hi @2Bdecided
Please try the solution provided in this FAQ article: How to fix the “Enter network credentials“ error when connecting to my NAS on Windows 10 or later? | QNAP
I suggest you try Solution 1, which involves resetting the Credential Manager.
Let us know if this helps!
Do you mean this? …
Nothing very exciting.
Other windows 10 and 11 laptops still working fine with this NAS, except the other one which upgraded to the same Win11 release. 
Cheers,
David.
Sadly that didn’t help at all. There was a credential saved there, but removing and re-creating didn’t help.
Bizarrely when I map the drive from windows explorer, I still get the “M:\ is not accessible. The specified server cannot perform the requested operation.” error message in windows explorer, but at the command line the M: drive appears and works fine!
SMB multichannel and min SMB version seem to be missing in your GUI… what firmware version is this ?
Thank you for that question. I was on 4.3.3.0188 Build 20170516.
I updated to 5.2.5.3145 2025/05/06 and now everything is working fine!
(Highest SMB version = 3; lowest = 2)
Many thanks for your help.
I have a TS-269L, also running FW 4.3.3.018 Build 20170516 and found the latest FW version for it is 4.3.4.2814 build 20240618. What does this mean to the casual, home owner, NAS user and will this FW version resolve the same issue I am having? I am unable to map (have not tried the command line) drives from my NAS on the 2 windows 11 laptops in the house.
Thank you for any assistance.
-Brian
I posted this in another thread, but it might work for you. This problem only seems to happen with Win11:-
I’ve not had that problem accessing my TS251A or TS251B but did have it trying to access a portable HDD (media server) on my router. It only happened with Windows 11. W10, W7 (VM) and Linux Mint were fine. Fixed by running these 3 commands on my W11 PC in PowerShell:
RUN AS ADMINISTRATOR
Set-SmbClientConfiguration -EnableInsecureGuestLogons $true -Force
Set-SmbClientConfiguration -RequireSecuritySignature $false -Force
Set-SmbServerConfiguration -RequireSecuritySignature $false -Force
There again, I didn’t try to access either NAS until AFTER I’d run the commands to access the HDD on the router.
You can also check the SMB level on old NAS via SSH
SMB2status
Thanks you Richard and dolby man.
I ran the powershell commands, drive appears, but is not accessible.
Here is the result of the smb2status command:
I have no issues with any of the NAS shares on any of my windows 10 machines and the issue only started on my oldest windows 11 machine after it was update by microsoft, the newest windows 11 machine was broken out of the box.
Thoughts?
-Brian
If you google that message you’ll get a few hits regarding resetting DNS and services etc.
I never went the “update” route but cloned the HDDs (laptop & PC - backups) before formatting the disks and installing 24H2, which may be why I’m not seeing the same problem.
