Event ID 8: Image … is not self-signed
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.
Image … is not self-signed.
Event 8
Kernel-Boot
System log
Warning
The time provider '…' returned an error when notified of a polling interval change.
Event 8
Time-Service
System log
Warning
File's duplicate info has been updated during flush.
Event 8
Ntfs
System log
Information
Port pause
Event 8
StorPort
System log
Information
An error occurred while verifying a signed message using the inserted smart card
Event 8
Security-Kerberos
System log
Information
SMB2 Request Create
Event 8
SMBServer
SMBServer/Operational log
Information