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.
A new process started. Only logged when Audit Process Creation is enabled; the command line is included only if that policy is also turned on.
What to check: Look at New Process Name, Creator Process Name and Process Command Line; Office or browser processes starting powershell.exe or cmd.exe are classic signs of malware.
A new process has been created.
Creator Subject:
Security ID: …
Account Name: …
Account Domain: …
Logon ID: …
Target Subject:
Security ID: …
Account Name: …
Account Domain: …
Logon ID: …
Process Information:
New Process ID: …
New Process Name: …!S!
Token Elevation Type: …
Mandatory Label: …
Creator Process ID: …
Creator Process Name: …!S!
Process Command Line: …!S!
Token Elevation Type indicates the type of token that was assigned to the new process in accordance with User Account Control policy.
Type 1 is a full token with no privileges removed or groups disabled. A full token is only used if User Account Control is disabled or if the user is the built-in Administrator account or a service account.
Type 2 is an elevated token with no privileges removed or groups disabled. An elevated token is used when User Account Control is enabled and the user chooses to start the program using Run as administrator. An elevated token is also used when an application is configured to always require administrative privilege or to always require maximum privilege, and the user is a member of the Administrators group.
Type 3 is a limited token with administrative privileges removed and administrative groups disabled. The limited token is used when User Account Control is enabled, the application does not require administrative privilege, and the user does not choose to start the program using Run as administrator.