Event ID 1030: The processing of Group Policy failed
Windows Event ID Lookup: What Windows event IDs mean: 4625, 4624, 4740, 6008, 41, 7045, 1102 and 3,000 more, with Windows' own message text, the fields and what to check.
Look up a Windows event ID from Event Viewer, a SIEM alert or a log export: what it means, the fields it records, and what to
check. Many IDs are used by more than one source (event 41 is both a Kernel-Power crash and a boot error), so every definition
is shown, the one people usually mean first. The message text is Windows' own, read from the event providers of
Windows 10.0.26200.0, 2026-10-28; the notes are ours, based on Microsoft's
security auditing reference.
The processing of Group Policy failed. Windows attempted to retrieve new Group Policy settings for this user or computer. Look in the details tab for error code and description. Windows will automatically retry this operation at the next refresh cycle. Computers joined to the domain must have proper name resolution and network connectivity to a domain controller for discovery of new Group Policy objects and settings. An event will be logged when Group Policy is successful.
Device … has been assigned to a guest partition.
Event 1030
Kernel-PnP
System log
Information
Message and fields (as Event Viewer shows them)
Device … has been assigned to a guest partition.
An MDL read or write completion request failed.
Event 1030
SMBServer
SMBServer/Operational log
Error
Message and fields (as Event Viewer shows them)
An MDL read or write completion request failed.
Server Name: …
Share Name: …
File Name: …
IsRead: …
Status: …
Guidance:
The SMB server sends MDL completion requests to a file system upon completion of a buffered I/O to release system resources. The file system and its filter drivers must not fail MDL completion requests. Failures may result in memory leaks and degraded system performance and stability. Non-Microsoft file system filter drivers are the most common cause of failed MDL completion requests.