ERROR_SMB_GUEST_LOGON_BLOCKED 0x800704F8

Error code 1272 · HRESULT 0x800704F8

WINDOWS

You can't access this shared folder because your organization's security policies block unauthenticated guest access. These policies help protect your PC from unsafe or malicious devices on the network.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

ERROR_SMB_GUEST_LOGON_BLOCKED is a Windows error code (system error 1272, returned as HRESULT 0x800704F8) reported by Windows. Its official message is: “You can't access this shared folder because your organization's security policies block unauthenticated guest access. These policies help protect your PC from unsafe or malicious devices on the network.”

How to fix ERROR_SMB_GUEST_LOGON_BLOCKED

  1. Run the affected program as administrator (right-click → Run as administrator)
  2. Check permissions on the target resource: Properties → Security → your account
  3. Check Event Viewer → Windows Logs → Security for the matching audit entry

Related errors

ERROR_SMB_NO_PREAUTH_INTEGRITY_HASH_OVERLAPERROR_SMB_BAD_CLUSTER_DIALECTERROR_MACHINE_LOCKEDERROR_CALLBACK_SUPPLIED_INVALID_DATAERROR_SYNC_FOREGROUND_REFRESH_REQUIREDERROR_INSTALL_FAILEDERROR_PACKAGE_REPOSITORY_CORRUPTEDERROR_INSTALL_FIREWALL_SERVICE_NOT_RUNNING

Source: Microsoft WinError.h

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