After installing W11 24H2, I discovered that I cannot access to my home NAS because my organization has disabled insecure guest logon.

The NAS is a reanimated ancient HP WD with a new 2TB SSD and OpenWRT, and I am not planning to add any personal access credentials up to now.

I also verified that this behavior is different than W11 23H2 which seems to have no problem with this NAS.

After a short investigation, I find this page on MS site, with the solution and the drawbacks.

The solution

Open the Group Policies Editor (search “gpedit“)

• go to Computer Configuration\Administrative Templates\Network\Lanman Workstation
• set ‘Enable insecure guest logon‘ to Enabled.

If you don’t have gpedit plugin (because you are using a W11 Home edition, for example), you can:

• add\edit the following registry key:
  HKLM\SOFTWARE\Policies\Microsoft\Windows\LanmanWorkstation
• add/edit this REG_DWORD value
  AllowInsecureGuestAuth
• set it to 1.