Microsoft-Windows-Spell-Checking

34 events across 3 channels

Event	Title	Channel	Sample
0	Reinitialize Provider	Analytic	N
1	Initialize wordlist request sent to provider	Analytic	N
2	Initialize wordlist request returned from provider	Analytic	N
3	Check request sent to provider	Analytic	N
4	Check request returned from provider	Analytic	N
5	CreateSpellChecker request sent to provider	Analytic	N
6	CreateSpellChecker request received from provider	Analytic	N
7	Suggest request sent to provider	Analytic	N
8	Suggest request receive from provider	Analytic	N
9	EnumSpellingErrorDecorator Next Start	Analytic	N
10	EnumSpellingErrorDecorator Next Stop	Analytic	N
11	SupportedLanguages request sent to provider	Analytic	N
12	SupportedLanguages request received from provider	Analytic	N
13	Initialize Provider start	Analytic	N
14	Initialize Provider complete	Analytic	N
16	File First is not Unicode (UTF-16LE).	Application	N
17	File string is not Unicode (UTF-16LE).	Application	N
18	string is not a directory.	Application	N
19	Unable to create directory string.	System	N
20	Attempt to initialize wordlist wordlist in languageTag spell checker failed.	Application	N
21	Get option value request sent to provider	Analytic	N
22	Get option value request received from provider	Analytic	N
23	Initialize wordlist from files request sent to provider	Analytic	N
24	Initialize wordlist from files request returned from provider	Analytic	N
25	Initiated URI Check	Analytic	N
26	Finished URI Check	Analytic	N
27	Failed to launch the watcher thread for changes in user wordlists and spell …	Application	N
28	Failed to watch for user wordlist changes: hr.	Application	N
29	Failed to watch for spell checking option changes: hr.	Application	N
30	Spell checking provider returned error indexes out of the string boundaries.	Application	N
31	Failed to update wordlist user custom wordlist: hr.	Application	N
32	ComprehensiveCheck request sent to provider	Analytic	N
33	ComprehensiveCheck request returned from provider	Analytic	N
34	Failed to add "First" to the text prediction language model.	Application	N

Event ID 0: Reinitialize Provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Opcode: Info

Description

Reinitialize Provider.

Message #

Reinitialize Provider

Event ID 1: Initialize wordlist request sent to provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Spellchecking
Opcode: Send

Description

Initialize wordlist request sent to provider.

Message #

Initialize wordlist request sent to provider

Fields #

Name	Description
`WordlistType` UInt32

Event ID 2: Initialize wordlist request returned from provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Spellchecking
Opcode: Receive

Description

Initialize wordlist request returned from provider.

Message #

Initialize wordlist request returned from provider

Fields #

Name	Description
`WordlistType` UInt32

Event ID 3: Check request sent to provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Spellchecking
Opcode: Send

Description

Check request sent to provider.

Message #

Check request sent to provider

Event ID 4: Check request returned from provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Spellchecking
Opcode: Receive

Description

Check request returned from provider.

Message #

Check request returned from provider

Event ID 5: CreateSpellChecker request sent to provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: GetSuggestions
Opcode: Send

Description

CreateSpellChecker request sent to provider.

Message #

CreateSpellChecker request sent to provider

Event ID 6: CreateSpellChecker request received from provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: GetSuggestions
Opcode: Receive

Description

CreateSpellChecker request received from provider.

Message #

CreateSpellChecker request received from provider

Event ID 7: Suggest request sent to provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: GetSuggestions
Opcode: Send

Description

Suggest request sent to provider.

Message #

Suggest request sent to provider

Event ID 8: Suggest request receive from provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: GetSuggestions
Opcode: Receive

Description

Suggest request receive from provider.

Message #

Suggest request receive from provider

Event ID 9: EnumSpellingErrorDecorator Next Start

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Spellchecking
Opcode: Send

Description

EnumSpellingErrorDecorator Next Start.

Message #

EnumSpellingErrorDecorator Next Start

Event ID 10: EnumSpellingErrorDecorator Next Stop

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Spellchecking
Opcode: Receive

Description

EnumSpellingErrorDecorator Next Stop.

Message #

EnumSpellingErrorDecorator Next Stop

Event ID 11: SupportedLanguages request sent to provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Opcode: Send

Description

SupportedLanguages request sent to provider.

Message #

SupportedLanguages request sent to provider

Event ID 12: SupportedLanguages request received from provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Opcode: Receive

Description

SupportedLanguages request received from provider.

Message #

SupportedLanguages request received from provider

Event ID 13: Initialize Provider start

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Opcode: Send

Description

Initialize Provider start.

Message #

Initialize Provider start

Event ID 14: Initialize Provider complete

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Opcode: Receive

Description

Initialize Provider complete.

Message #

Initialize Provider complete

Event ID 16: File First is not Unicode (UTF-16LE).

Provider: Microsoft-Windows-Spell-Checking
Channel: Application
Opcode: Info

Description

File First is not Unicode (UTF-16LE). It has been moved to Second.

Message #

File %1 is not Unicode (UTF-16LE). It has been moved to %2.

Fields #

Name	Description
`First` UnicodeString
`Second` UnicodeString

Event ID 17: File string is not Unicode (UTF-16LE).

Provider: Microsoft-Windows-Spell-Checking
Channel: Application
Opcode: Info

Description

File string is not Unicode (UTF-16LE). Unable to rename it. This will block spell checkers from using wordlists in this directory.

Message #

File %1 is not Unicode (UTF-16LE). Unable to rename it. This will block spell checkers from using wordlists in this directory.

Fields #

Name	Description
`string` UnicodeString

Event ID 18: string is not a directory.

Provider: Microsoft-Windows-Spell-Checking
Channel: Application
Opcode: Info

Description

string is not a directory. Please remove or rename.

Message #

%1 is not a directory. Please remove or rename.

Fields #

Name	Description
`string` UnicodeString

Event ID 19: Unable to create directory string.

Provider: Microsoft-Windows-Spell-Checking
Channel: System
Opcode: Info

Description

Unable to create directory string.

Message #

Unable to create directory %1.

Fields #

Name	Description
`string` UnicodeString

Event ID 20: Attempt to initialize wordlist wordlist in languageTag spell checker failed.

Provider: Microsoft-Windows-Spell-Checking
Channel: Application
Opcode: Info

Description

Attempt to initialize wordlist wordlist in languageTag spell checker failed. This could be due to a bug with the spell checker. The spell checker will remain available.

Message #

Attempt to initialize %1 wordlist in %2 spell checker failed. This could be due to a bug with the spell checker. The spell checker will remain available.

Fields #

Name	Description
`wordlist` UInt32
`languageTag` UnicodeString

Event ID 21: Get option value request sent to provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Options
Opcode: Send

Description

Get option value request sent to provider.

Message #

Get option value request sent to provider

Event ID 22: Get option value request received from provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Options
Opcode: Receive

Description

Get option value request received from provider.

Message #

Get option value request received from provider

Event ID 23: Initialize wordlist from files request sent to provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Spellchecking
Opcode: Send

Description

Initialize wordlist from files request sent to provider.

Message #

Initialize wordlist from files request sent to provider

Fields #

Name	Description
`WordlistType` UInt32

Event ID 24: Initialize wordlist from files request returned from provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Spellchecking
Opcode: Receive

Description

Initialize wordlist from files request returned from provider.

Message #

Initialize wordlist from files request returned from provider

Fields #

Name	Description
`WordlistType` UInt32

Event ID 25: Initiated URI Check

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Spellchecking
Opcode: Send

Description

Initiated URI Check.

Message #

Initiated URI Check

Event ID 26: Finished URI Check

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Spellchecking
Opcode: Receive

Description

Finished URI Check.

Message #

Finished URI Check

Event ID 27: Failed to launch the watcher thread for changes in user wordlists and spell checking options: hr.

Provider: Microsoft-Windows-Spell-Checking
Channel: Application
Opcode: Info

Description

Failed to launch the watcher thread for changes in user wordlists and spell checking options: hr. Spell checking will remain available, but no changes will be reported.

Message #

Failed to launch the watcher thread for changes in user wordlists and spell checking options: %1. Spell checking will remain available, but no changes will be reported.

Fields #

Name	Description
`hr` Int32

Event ID 28: Failed to watch for user wordlist changes: hr.

Provider: Microsoft-Windows-Spell-Checking
Channel: Application
Opcode: Info

Description

Failed to watch for user wordlist changes: hr. Spell checking will remain available, but no changes will be reported.

Message #

Failed to watch for user wordlist changes: %1. Spell checking will remain available, but no changes will be reported.

Fields #

Name	Description
`hr` Int32

Event ID 29: Failed to watch for spell checking option changes: hr.

Provider: Microsoft-Windows-Spell-Checking
Channel: Application
Opcode: Info

Description

Failed to watch for spell checking option changes: hr. Spell checking will remain available, but no changes will be reported.

Message #

Failed to watch for spell checking option changes: %1. Spell checking will remain available, but no changes will be reported.

Fields #

Name	Description
`hr` Int32

Event ID 30: Spell checking provider returned error indexes out of the string boundaries.

Provider: Microsoft-Windows-Spell-Checking
Channel: Application
Opcode: Info

Description

Spell checking provider returned error indexes out of the string boundaries. This indicates that the provider either has a bug or that it is malicious.

Message #

Spell checking provider returned error indexes out of the string boundaries. This indicates that the provider either has a bug or that it is malicious.

Event ID 31: Failed to update wordlist user custom wordlist: hr.

Provider: Microsoft-Windows-Spell-Checking
Channel: Application
Opcode: Info

Description

Failed to update wordlist user custom wordlist: hr. Spell checking will remain available, but this user wordlist will not be updated.

Message #

Failed to update %1 user custom wordlist: %2. Spell checking will remain available, but this user wordlist will not be updated.

Fields #

Name	Description
`wordlist` UInt32
`hr` Int32

Event ID 32: ComprehensiveCheck request sent to provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Spellchecking
Opcode: Send

Description

ComprehensiveCheck request sent to provider.

Message #

ComprehensiveCheck request sent to provider

Event ID 33: ComprehensiveCheck request returned from provider

Provider: Microsoft-Windows-Spell-Checking
Channel: Analytic
Task: Spellchecking
Opcode: Receive

Description

ComprehensiveCheck request returned from provider.

Message #

ComprehensiveCheck request returned from provider

Event ID 34: Failed to add "First" to the text prediction language model.

Provider: Microsoft-Windows-Spell-Checking
Channel: Application
Opcode: Info

Description

Failed to add "First" to the text prediction language model. Language tag - Second, HRESULT - hr. The word has still been added to the spell checker custom dictionary.

Message #

Failed to add "%1" to the text prediction language model. Language tag - %2, HRESULT - %3. The word has still been added to the spell checker custom dictionary.

Fields #

Name	Description
`First` UnicodeString
`Second` UnicodeString
`hr` Int32

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 d0e22efc-ac66-4b25-a72d-382736b5e940

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

Observed on:

WS2022-20348.4893, schema read from the registered manifest, binary version 10.0.20348.1, captured 2026-06-02
Win11-26200.6584, schema read from the registered manifest, binary version 10.0.26100.1, captured 2026-06-02

`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)