Microsoft-Windows-WindowsSystemAssessmentTool

Event	Title	Channel	Sample	Rule
0	TestV1 TestV2 TestV3 TestV4.	Operational	N	N
1	WinSAT Application Start: StartTimeOfDay.	Operational	Y	N
2	WinSAT Application Command Line CommandLine.	Operational	Y	N
3	WinSAT Application Stop: ExitCode.	Operational	Y	N
4	ERROR.	Operational	N	N
5	COM ERROR: Source Interface.	Operational	N	N
6	ERROR.	Operational	N	N
7	ERROR: FailingHresult ErrorMsg.	Operational	N	N
8	Message.	Operational	N	N
9	PhaseID:Description.	Operational	Y	N
10	PhaseID.	Operational	Y	N
11	Main watch dog timeout - terminating process	Operational	N	N
12	Assessment watch dog timeout - terminating process	Operational	N	N
13	Short watch dog timeout - terminating process	Operational	N	N

Event ID 0: TestV1 TestV2 TestV3 TestV4.

Channel: Operational
Task: Application

Message #

%1 %2 %3 %4

Fields #

Name	Description
`TestV1` UInt32
`TestV2` UInt32
`TestV3` UInt32
`TestV4` UnicodeString

Event ID 1: WinSAT Application Start: StartTimeOfDay.

Channel: Operational
Task: Application
Opcode: Start

Message #

WinSAT Application Start: %1

Fields #

Name	Description
`StartTimeOfDay` FILETIME

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-WindowsSystemAssessmentTool",
    "guid": "11A75546-3234-465E-BEC8-2D301CB501AC",
    "event_source_name": "",
    "event_id": 1,
    "version": 0,
    "level": 0,
    "task": 1,
    "opcode": 1,
    "keywords": 9223372036854775808,
    "time_created": "2022-04-04T08:01:33.192091+00:00",
    "event_record_id": 1,
    "correlation": {},
    "execution": {
      "process_id": 3768,
      "thread_id": 4432
    },
    "channel": "Microsoft-Windows-WindowsSystemAssessmentTool/Operational",
    "computer": "WIN-TKC15D7KHUR",
    "security": {
      "user_id": "S-1-5-21-1958040314-2592322477-2606035944-500"
    }
  },
  "event_data": {
    "StartTimeOfDay": "2022-04-04T08:01:33.191900Z"
  },
  "message": ""
}

References #

Example event sourced from https://github.com/NextronSystems/evtx-baseline

Event ID 2: WinSAT Application Command Line CommandLine.

Channel: Operational
Task: Application

Message #

WinSAT Application Command Line %2

Fields #

Name	Description
`CommandLineSize` UInt16
`CommandLine` UnicodeString

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-WindowsSystemAssessmentTool",
    "guid": "11A75546-3234-465E-BEC8-2D301CB501AC",
    "event_source_name": "",
    "event_id": 2,
    "version": 0,
    "level": 0,
    "task": 1,
    "opcode": 0,
    "keywords": 9223372036854775808,
    "time_created": "2022-04-04T08:01:33.246239+00:00",
    "event_record_id": 3,
    "correlation": {},
    "execution": {
      "process_id": 3768,
      "thread_id": 4432
    },
    "channel": "Microsoft-Windows-WindowsSystemAssessmentTool/Operational",
    "computer": "WIN-TKC15D7KHUR",
    "security": {
      "user_id": "S-1-5-21-1958040314-2592322477-2606035944-500"
    }
  },
  "event_data": {
    "CommandLineSize": 92,
    "CommandLine": "C:\\Windows\\system32\\winsat.exe formal -log -cancelevent c44be6b9-8148-4e99-84df-c74f2f9e27e2"
  },
  "message": ""
}

References #

Example event sourced from https://github.com/NextronSystems/evtx-baseline

Event ID 3: WinSAT Application Stop: ExitCode.

Channel: Operational
Task: Application
Opcode: Stop

Message #

WinSAT Application Stop: %1

Fields #

Name	Description
`ExitCode` UInt32

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-WindowsSystemAssessmentTool",
    "guid": "11A75546-3234-465E-BEC8-2D301CB501AC",
    "event_source_name": "",
    "event_id": 3,
    "version": 0,
    "level": 0,
    "task": 1,
    "opcode": 2,
    "keywords": 9223372036854775808,
    "time_created": "2022-04-04T08:03:12.759191+00:00",
    "event_record_id": 82,
    "correlation": {},
    "execution": {
      "process_id": 3768,
      "thread_id": 4432
    },
    "channel": "Microsoft-Windows-WindowsSystemAssessmentTool/Operational",
    "computer": "WIN-TKC15D7KHUR",
    "security": {
      "user_id": "S-1-5-21-1958040314-2592322477-2606035944-500"
    }
  },
  "event_data": {
    "ExitCode": 0
  },
  "message": ""
}

References #

Example event sourced from https://github.com/NextronSystems/evtx-baseline

Event ID 4: ERROR.

Channel: Operational
Task: Application

Description

ERROR: CantMsg

Message #

ERROR: %3

Fields #

Name	Description
`Win32Error` UInt32
`CantMsgSize` UInt16
`CantMsg` UnicodeString

Event ID 5: COM ERROR: Source Interface.

Channel: Operational
Task: Application

Message #

COM ERROR: %4 %6

Fields #

Name	Description
`FailingHresult` HexInt32
`FailingInterfaceCLSID` GUID
`SourceSize` UInt16
`Source` UnicodeString
`InfterfaceSize` UInt16
`Interface` UnicodeString
`ErrorMsgSize` UInt16
`ErrorMsg` UnicodeString
`CantMsgSize` UInt16
`CantMsg` UnicodeString

Event ID 6: ERROR.

Channel: Operational
Task: Application

Description

ERROR: ErrorMsg

Message #

ERROR: %2

Fields #

Name	Description
`ErrorMsgSize` UInt16
`ErrorMsg` UnicodeString

Event ID 7: ERROR: FailingHresult ErrorMsg.

Channel: Operational
Task: Application

Message #

ERROR: %1 %3

Fields #

Name	Description
`FailingHresult` HexInt32
`ErrorMsgSize` UInt16
`ErrorMsg` UnicodeString
`CantMsgSize` UInt16
`CantMsg` UnicodeString

Event ID 8: Message.

Channel: Operational
Task: Application

Message #

%2

Fields #

Name	Description
`MessageSize` UInt16
`Message` AnsiString

Event ID 9: PhaseID:Description.

Channel: Operational
Level: Informational
Task: Application

Message #

%1:%3

Fields #

Name	Description
`PhaseID` UInt16
`DescriptionSize` UInt16
`Description` UnicodeString

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-WindowsSystemAssessmentTool",
    "guid": "11A75546-3234-465E-BEC8-2D301CB501AC",
    "event_source_name": "",
    "event_id": 9,
    "version": 0,
    "level": 4,
    "task": 1,
    "opcode": 0,
    "keywords": 9223372036854775808,
    "time_created": "2022-04-04T08:03:12.754854+00:00",
    "event_record_id": 80,
    "correlation": {},
    "execution": {
      "process_id": 3768,
      "thread_id": 4432
    },
    "channel": "Microsoft-Windows-WindowsSystemAssessmentTool/Operational",
    "computer": "WIN-TKC15D7KHUR",
    "security": {
      "user_id": "S-1-5-21-1958040314-2592322477-2606035944-500"
    }
  },
  "event_data": {
    "PhaseID": 140,
    "DescriptionSize": 24,
    "Description": "Restore system policies"
  },
  "message": ""
}

References #

Example event sourced from https://github.com/NextronSystems/evtx-baseline

Event ID 10: PhaseID.

Channel: Operational
Level: Informational
Task: Application

Message #

%1

Fields #

Name	Description
`PhaseID` UInt16

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-WindowsSystemAssessmentTool",
    "guid": "11A75546-3234-465E-BEC8-2D301CB501AC",
    "event_source_name": "",
    "event_id": 10,
    "version": 0,
    "level": 4,
    "task": 1,
    "opcode": 0,
    "keywords": 9223372036854775808,
    "time_created": "2022-04-04T08:03:12.761466+00:00",
    "event_record_id": 83,
    "correlation": {},
    "execution": {
      "process_id": 3768,
      "thread_id": 4432
    },
    "channel": "Microsoft-Windows-WindowsSystemAssessmentTool/Operational",
    "computer": "WIN-TKC15D7KHUR",
    "security": {
      "user_id": "S-1-5-21-1958040314-2592322477-2606035944-500"
    }
  },
  "event_data": {
    "PhaseID": 150
  },
  "message": ""
}

References #

Example event sourced from https://github.com/NextronSystems/evtx-baseline

Event ID 11: Main watch dog timeout - terminating process

Channel: Operational
Task: Application

Event ID 12: Assessment watch dog timeout - terminating process

Channel: Operational
Task: Application

Event ID 13: Short watch dog timeout - terminating process

Channel: Operational
Task: Application

Provenance

ETW provider GUID 11a75546-3234-465e-bec8-2d301cb501ac

Defined in WINSAT.EXE, which carries the event manifest.

WS2022-20348.4893, schema read from the registered manifest, binary version 10.0.20348.1, captured 2026-06-02 — Manifest XML pack, 1.9 MB
Win11-26200.6584, schema read from the registered manifest, binary version 10.0.26100.1, captured 2026-06-02 — Manifest XML pack, 2.0 MB