Microsoft-Windows-FileHistory-Engine

19 events across 2 channels

Event	Title	Channel	Sample
1	UsnJournalScanStart	Debug	N
2	UsnJournalScanStop	Debug	N
3	BackupOneFileStart	Debug	N
4	BackupOneFileStop	Debug	N
5	BackupAllFilesStart	Debug	N
6	BackupAllFilesStop	Debug	N
7	CatalogFlushStart	Debug	N
8	CatalogFlushStop	Debug	N
9	BackupSizeQuotaChange	Debug	N
10	UsnEventProcessingStart	Debug	N
11	UsnEventProcessingStop	Debug	N
12	ScanAndBackupStart	Debug	N
13	ScanAndBackupStop	Debug	N
100	File was not backed up due to its full path exceeding MAX_PATH limit or …	BackupLog	N
101	File/directory was not backed up due to being encrypted or insufficient …	BackupLog	N
102	File was not backed up due to an error.	BackupLog	N
103	File was not backed up due to an error.	BackupLog	N
104	File was not backed up due to being open by an application.	BackupLog	N
105	File was successfully backed up.	BackupLog	N

Event ID 1: UsnJournalScanStart

Provider: Microsoft-Windows-FileHistory-Engine
Channel: Debug
Task: UsnJournalScan
Opcode: Start

Event ID 2: UsnJournalScanStop

Provider: Microsoft-Windows-FileHistory-Engine
Channel: Debug
Task: UsnJournalScan
Opcode: Stop

Event ID 3: BackupOneFileStart

Provider: Microsoft-Windows-FileHistory-Engine
Channel: Debug
Task: BackupOneFile
Opcode: Start

Fields #

Name	Description
`SourcePath` UnicodeString
`DestPath` UnicodeString
`Size` Int64

Event ID 4: BackupOneFileStop

Provider: Microsoft-Windows-FileHistory-Engine
Channel: Debug
Task: BackupOneFile
Opcode: Stop

Fields #

Name	Description
`SourcePath` UnicodeString
`DestPath` UnicodeString
`Size` Int64

Event ID 5: BackupAllFilesStart

Provider: Microsoft-Windows-FileHistory-Engine
Channel: Debug
Task: BackupAllFiles
Opcode: Start

Event ID 6: BackupAllFilesStop

Provider: Microsoft-Windows-FileHistory-Engine
Channel: Debug
Task: BackupAllFiles
Opcode: Stop

Fields #

Name	Description
`TotalSize` Int64
`TotalFiles` UInt64

Event ID 7: CatalogFlushStart

Provider: Microsoft-Windows-FileHistory-Engine
Channel: Debug
Task: CatalogFlush
Opcode: Start

Event ID 8: CatalogFlushStop

Provider: Microsoft-Windows-FileHistory-Engine
Channel: Debug
Task: CatalogFlush
Opcode: Stop

Event ID 9: BackupSizeQuotaChange

Provider: Microsoft-Windows-FileHistory-Engine
Channel: Debug
Task: BackupSizeQuotaChange

Fields #

Name	Description
`OldQuota` UInt64
`NewQuota` UInt64

Event ID 10: UsnEventProcessingStart

Provider: Microsoft-Windows-FileHistory-Engine
Channel: Debug
Task: UsnEventProcessing
Opcode: Start

Event ID 11: UsnEventProcessingStop

Provider: Microsoft-Windows-FileHistory-Engine
Channel: Debug
Task: UsnEventProcessing
Opcode: Stop

Event ID 12: ScanAndBackupStart

Provider: Microsoft-Windows-FileHistory-Engine
Channel: Debug
Task: ScanAndBackup
Opcode: Start

Event ID 13: ScanAndBackupStop

Provider: Microsoft-Windows-FileHistory-Engine
Channel: Debug
Task: ScanAndBackup
Opcode: Stop

Event ID 100: File was not backed up due to its full path exceeding MAX_PATH limit or containing unsupported characters.

Provider: Microsoft-Windows-FileHistory-Engine
Channel: BackupLog
Opcode: Info

Description

File was not backed up due to its full path exceeding MAX_PATH limit or containing unsupported characters.

Message #

File was not backed up due to its full path exceeding MAX_PATH limit or containing unsupported characters:

%1

If you want it to be protected, try using different directory and file names.

Fields #

Name	Description
`Path` UnicodeString

Event ID 101: File/directory was not backed up due to being encrypted or insufficient permissions.

Provider: Microsoft-Windows-FileHistory-Engine
Channel: BackupLog
Opcode: Info

Description

File/directory was not backed up due to being encrypted or insufficient permissions.

Message #

File/directory was not backed up due to being encrypted or insufficient permissions:

%1

If you want it to be protected, remove encryption or ask your system administrator to give you access to this file/directory.

Fields #

Name	Description
`Path` UnicodeString

Event ID 102: File was not backed up due to an error.

Provider: Microsoft-Windows-FileHistory-Engine
Channel: BackupLog
Opcode: Info

Description

File was not backed up due to an error.

Message #

File was not backed up due to an error:

%1

Windows will not attempt to back up the file again, unless it is modified.

Fields #

Name	Description
`Path` UnicodeString
`Hr` UInt32

Event ID 103: File was not backed up due to an error.

Provider: Microsoft-Windows-FileHistory-Engine
Channel: BackupLog
Opcode: Info

Description

File was not backed up due to an error.

Message #

File was not backed up due to an error:

%1

Windows will attempt to back up the file at a later time.

Fields #

Name	Description
`Path` UnicodeString
`Hr` UInt32

Event ID 104: File was not backed up due to being open by an application.

Provider: Microsoft-Windows-FileHistory-Engine
Channel: BackupLog
Opcode: Info

Description

File was not backed up due to being open by an application.

Message #

File was not backed up due to being open by an application:

%1

Windows will attempt to back up the file at a later time.

Fields #

Name	Description
`Path` UnicodeString

Event ID 105: File was successfully backed up.

Provider: Microsoft-Windows-FileHistory-Engine
Channel: BackupLog
Opcode: Info

Description

File was successfully backed up.

Message #

File was successfully backed up:

%1

Fields #

Name	Description
`Path` UnicodeString

Provenance

Where this provider's schema came from, and which Windows build it was observed on. Windows can change a provider's event schema between builds, so use this to judge whether it matches the build you collect from.

ETW provider GUID b447b4de-7780-11e0-ada3-18a90531a85a

Defined in fhsvc.dll, which carries the event manifest.

Observed on:

Win11-26200.6584, schema read from the registered manifest, binary version 10.0.26100.1, captured 2026-06-02

Downloads

Microsoft-Windows-FileHistory-Engine registered manifest XML (in the Win11-26200.6584 manifest pack, 2.0 MB) manifest-xml

`j` / `k`	Scroll down / up
`d` / `u`	Half-page down / up
`gg` / `G`	Top / bottom
`h` / `l`	History back / forward
`f`	Follow link (`Shift` = new tab)
`/`	Focus search
`?`	Toggle this help
`↑` / `↓`	Navigate search results
`Enter`	Open highlighted result
`Esc`	Close results / dialog

`type:`	`events` / `rules` / `providers`
`vendor:`	`sigma` / `elastic` / `splunk` / `kusto` / `chronicle` (vendor name alone also works: `sigma:`, `kql:`, `secops:`…)
`tactic:`	TA-id, slug, or name: `credential_access`, `TA0006`
`technique:`	technique or sub-technique ID: `T1003`, `T1003.001` (alias `tech:`)
`severity:`	`critical` / `high` / `medium` / `low` / `informational` (alias `sev:`)
`risk_score`	Numeric comparison on the Elastic risk score (0 to 100): `risk_score>50`, `risk_score<=20`, `risk_score=99` (alias `risk`; Elastic rules only)
`stages:`	Rules with exactly N pipeline stages
`correlation:`	`single_event` / `sequence` / `alternatives` / `alternatives_cross_log` / `all_required` / `correlated`
`with:`	Co-occurrence event-id; stacks (`with:4624 with:4769`) to require all, while a comma list in one occurrence (`with:4624,4769`) is an either-or group. Implies multi-event
`like:`	Structural neighbors of a rule slug (equivalents + subsumption stricter / broader): `like:comsvcs_lsass_memory_dump-splunk-sysmon`
`groupby:`	Entity-grouping substring match against `group_by_keys`: `groupby:user`, `groupby:host`
`uses:`	Rules whose predicate tree touches the field (any kind, any value): `uses:CommandLine`
`excludes:`	Rules with top-level `not()` clauses on the field (FP whitelists): `excludes:ParentImage`
`field:` / `value:`	Predicate search; narrows rule cards to those with a matching leaf and drives the indicator tier. Unquoted = substring, wildcards allowed (`value:mimikatz`)
`indicator:`	Shorthand for `field:F value:V`: `indicator:Image=*\powershell.exe`
`kind:`	Filter by predicate kind. Narrows rule cards to those carrying a matching predicate leaf (`vendor:elastic kind:cidr_match`) and drives the indicator tier: `contains` / `starts_with` / `ends_with` / `regex` / `cidr` / `eq` / `in` … (operator aliases `op:`/`match:`)
`has:` / `no:`	`sample`, `field`, `notes`, `refs`, `trace`, `thirdparty`, `rule`, `pattern`, `timewindow`, `threshold`, `newterms`, `sigma`/`elastic`/`splunk`/`kusto`/`chronicle`
`-op:val`	Exclude matches; works on most operators but not `type:`/`like:`/`has:`/`no:` (use `no:<flag>` to exclude a rule flag): `tactic:execution -vendor:splunk`. Standalone `-kind:`/`-field:`/`-value:` drop every rule carrying a matching predicate leaf (`type:rules -kind:is_null`)
`field:"…"` / `value:"…"`	Quoted value = anchored exact match (also allows spaces): `value:"net user"`
`a,b`	Comma = OR inside one operator (`vendor:sigma,elastic`, `severity:high,critical`); repeating a facet merges the same way. `field:`/`value:` never split (literal commas)
`vendors:` / `stage:`	Singular and plural spellings fold to the canonical operator and value: `tactics:` = `tactic:`, `type:event` = `type:events`, `correlation:sequences` = `correlation:sequence`, `has:thresholds` = `has:threshold`
`"quoted phrase"`	Exact-match a multi-word phrase (free text)