0x80004005 (Unspecified error) when accessing network share in Windows 7

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I'm getting error 0x80004005 when trying to access a network share in Windows 7. The network share was created from a Windows 7 computer and is being accessed by a Windows 7 computer. The same exact configuration worked properly a month ago and for whatever reason doesn't work anymore.

I've tried

  • Creating HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\LocalAccountTokenFilterPolicy and setting the value to 1
  • Removing all 6to4 adapters in Device Manager
  • Disabling IPv6 and setting IPv4 to a static address on the same subnet mask as the other computer
  • Verifying the two computers are on the same workgroup
  • Disabling the firewall and antivirus
  • Updating Windows
  • Accessing the share using \\[IP_ADDRESS]\[SHARE] and \\[HOSTNAME]\[SHARE]
  • On the host computer (server) checking \\localhost for the share - the share does appear and I can access files
  • Enabling NetBIOS over TCP/IP

How can I access this network share? Any help would be appreciated!

windows-7
windows
networking
network-shares
asked on Super User Jan 21, 2019 by etnguyen03

3 Answers

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I recently resolved this issue by enabling the following group policy permission:

Local Computer Policy>Computer Configuration>Administrative Templates>Network>Lanman Workstation>Enable insecure guest logons

answered on Super User Mar 11, 2019 by Ivan Gagne
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Fixed by installing KB4487345.

answered on Super User May 11, 2019 by etnguyen03
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I had this problem in Windows 10, trying to access an open share (without username).

To fix it, you need to enable "AllowInsecureGuestAuth" in the registry under
"HKLM\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters".

You can check what it is on your system with

reg query HKLM\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters /v AllowInsecureGuestAuth

And you can set it to enable "AllowInsecureGuestAuth" with

reg add HKLM\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters /v AllowInsecureGuestAuth /t REG_DWORD /d 1

You need to do that in a Command Prompt or Powershell started as Admin (or "Run as Administrator")

answered on Super User Jan 7, 2021 by mivk

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