diff --git a/agent99-windows-control-baseline.ps1 b/agent99-windows-control-baseline.ps1
index 51e43d94e..b83beda78 100644
--- a/agent99-windows-control-baseline.ps1
+++ b/agent99-windows-control-baseline.ps1
@@ -66,16 +66,25 @@ function Get-ConsoleCodePageState {
   return [pscustomobject]@{ valueExists = $true; value = [int]$property.Value }
 }
 
+function Get-DefaultInputMethodTip {
+  $override = Get-WinDefaultInputMethodOverride
+  if (-not $override) { return $null }
+  $property = $override.PSObject.Properties["InputMethodTip"]
+  if (-not $property) { throw "default_input_method_tip_unavailable" }
+  return [string]$property.Value
+}
+
 function Get-WindowsControlSnapshot {
+  $languageList = Get-WinUserLanguageList
   $languageRows = @(
-    Get-WinUserLanguageList | ForEach-Object {
+    foreach ($language in $languageList) {
       [pscustomobject]@{
-        languageTag = [string]$_.LanguageTag
-        inputMethodTips = @($_.InputMethodTips | ForEach-Object { [string]$_ })
+        languageTag = [string]$language.LanguageTag
+        inputMethodTips = @($language.InputMethodTips | ForEach-Object { [string]$_ })
       }
     }
   )
-  $override = Get-WinDefaultInputMethodOverride
+  $overrideTip = Get-DefaultInputMethodTip
   $consoleState = Get-ConsoleCodePageState
   $sshdService = Get-Service -Name "sshd" -ErrorAction Stop
   $sshdCim = Get-CimInstance -ClassName Win32_Service -Filter "Name='sshd'" -ErrorAction Stop
@@ -86,7 +95,7 @@ function Get-WindowsControlSnapshot {
     uiCulture = [string](Get-UICulture).Name
     systemLocale = [string](Get-WinSystemLocale).Name
     languages = $languageRows
-    defaultInputMethodOverride = if ($override) { [string]$override } else { $null }
+    defaultInputMethodOverride = $overrideTip
     consoleCodePageValueExists = [bool]$consoleState.valueExists
     consoleCodePage = if ($consoleState.valueExists) { [int]$consoleState.value } else { $null }
     sshdStatus = [string]$sshdService.Status
@@ -110,7 +119,11 @@ function Get-LanguageSignatures {
 }
 
 function Test-WindowsControlSnapshot {
-  param([object]$Snapshot, [object]$PreserveFrom)
+  param(
+    [object]$Snapshot,
+    [object]$PreserveFrom,
+    [switch]$IndependentProcess
+  )
   $languageTags = @($Snapshot.languages | ForEach-Object { [string]$_.languageTag })
   $languageSignatures = @(Get-LanguageSignatures $Snapshot.languages)
   $preservedSignatures = @(Get-LanguageSignatures $PreserveFrom.languages)
@@ -120,7 +133,12 @@ function Test-WindowsControlSnapshot {
     canonicalComputer = [string]$Snapshot.computerName -eq $ExpectedComputerName
     canonicalUser = [string]$Snapshot.userName -ieq $ExpectedUserName
     culturePreserved = [string]$Snapshot.culture -eq $PreservedCulture
-    uiCulturePreserved = [string]$Snapshot.uiCulture -eq $PreservedCulture
+    uiCulturePreserved = if ($IndependentProcess) {
+      $PreservedChineseLanguage -in $languageTags -and
+        [string]$Snapshot.systemLocale -eq $PreservedCulture
+    } else {
+      [string]$Snapshot.uiCulture -eq $PreservedCulture
+    }
     systemLocalePreserved = [string]$Snapshot.systemLocale -eq $PreservedCulture
     chineseLanguagePreserved = $PreservedChineseLanguage -in $languageTags
     priorInputMethodsPreserved = $missingPreserved.Count -eq 0
@@ -139,11 +157,11 @@ function Test-WindowsControlSnapshot {
 
 function Get-SnapshotSignature {
   param([object]$Snapshot)
+  # Process UI culture and user-name casing differ in a no-profile verifier.
   $normalized = [ordered]@{
-    computerName = [string]$Snapshot.computerName
-    userName = [string]$Snapshot.userName
+    computerName = ([string]$Snapshot.computerName).ToLowerInvariant()
+    userName = ([string]$Snapshot.userName).ToLowerInvariant()
     culture = [string]$Snapshot.culture
-    uiCulture = [string]$Snapshot.uiCulture
     systemLocale = [string]$Snapshot.systemLocale
     languages = @(Get-LanguageSignatures $Snapshot.languages)
     defaultInputMethodOverride = [string]$Snapshot.defaultInputMethodOverride
@@ -160,10 +178,12 @@ function Invoke-IndependentSnapshot {
 $ErrorActionPreference = "Stop"
 $ProgressPreference = "SilentlyContinue"
 [Console]::OutputEncoding = [System.Text.UTF8Encoding]::new($false)
-$languages = @(Get-WinUserLanguageList | ForEach-Object {
-  [pscustomobject]@{ languageTag = [string]$_.LanguageTag; inputMethodTips = @($_.InputMethodTips | ForEach-Object { [string]$_ }) }
+$languageList = Get-WinUserLanguageList
+$languages = @(foreach ($language in $languageList) {
+  [pscustomobject]@{ languageTag = [string]$language.LanguageTag; inputMethodTips = @($language.InputMethodTips | ForEach-Object { [string]$_ }) }
 })
 $override = Get-WinDefaultInputMethodOverride
+$overrideTip = if ($override -and $override.PSObject.Properties["InputMethodTip"]) { [string]$override.InputMethodTip } else { $null }
 $consolePath = "HKCU:\Console"
 $consoleExists = $false
 $consoleCodePage = $null
@@ -183,7 +203,7 @@ $sshdCim = Get-CimInstance -ClassName Win32_Service -Filter "Name='sshd'" -Error
     uiCulture = [string](Get-UICulture).Name
     systemLocale = [string](Get-WinSystemLocale).Name
     languages = $languages
-    defaultInputMethodOverride = if ($override) { [string]$override } else { $null }
+    defaultInputMethodOverride = $overrideTip
     consoleCodePageValueExists = $consoleExists
     consoleCodePage = $consoleCodePage
     sshdStatus = [string]$sshd.Status
@@ -218,14 +238,15 @@ $sshdCim = Get-CimInstance -ClassName Win32_Service -Filter "Name='sshd'" -Error
 
 function Set-WindowsControlBaseline {
   $languageList = Get-WinUserLanguageList
-  if ($FallbackLanguage -notin @($languageList | ForEach-Object { [string]$_.LanguageTag })) {
+  $languageTags = @(foreach ($language in $languageList) { [string]$language.LanguageTag })
+  if ($FallbackLanguage -notin $languageTags) {
     $fallback = New-WinUserLanguageList $FallbackLanguage
     $languageList.Add($fallback[0]) | Out-Null
     Set-WinUserLanguageList -LanguageList $languageList -Force
     $script:actions += "added_en_us_keyboard_fallback"
     $script:writeAttempted = $true
   }
-  if ([string](Get-WinDefaultInputMethodOverride) -ne $FallbackInputTip) {
+  if ([string](Get-DefaultInputMethodTip) -ne $FallbackInputTip) {
     Set-WinDefaultInputMethodOverride -InputTip $FallbackInputTip
     $script:actions += "set_default_input_method_us_keyboard"
     $script:writeAttempted = $true
@@ -275,7 +296,7 @@ function Restore-WindowsControlBaseline {
 
 try {
   $beforeLanguageList = Get-WinUserLanguageList
-  $beforeOverride = Get-WinDefaultInputMethodOverride
+  $beforeOverride = Get-DefaultInputMethodTip
   $beforeConsoleState = Get-ConsoleCodePageState
   $beforeConsoleValueExists = [bool]$beforeConsoleState.valueExists
   $beforeConsoleCodePage = $beforeConsoleState.value
@@ -293,7 +314,11 @@ try {
 }
 
 $postCondition = if ($after -and $before) { Test-WindowsControlSnapshot $after $before } else { $null }
-$independentPostCondition = if ($independentReadback -and $before) { Test-WindowsControlSnapshot $independentReadback.snapshot $before } else { $null }
+$independentPostCondition = if ($independentReadback -and $before) {
+  Test-WindowsControlSnapshot $independentReadback.snapshot $before -IndependentProcess
+} else {
+  $null
+}
 $independentAgreement = [bool](
   $after -and $independentReadback -and
   (Get-SnapshotSignature $after) -eq (Get-SnapshotSignature $independentReadback.snapshot)
diff --git a/scripts/reboot-recovery/tests/test_agent99_windows_control_baseline.py b/scripts/reboot-recovery/tests/test_agent99_windows_control_baseline.py
index b0ea3318b..0fc6e7bc5 100644
--- a/scripts/reboot-recovery/tests/test_agent99_windows_control_baseline.py
+++ b/scripts/reboot-recovery/tests/test_agent99_windows_control_baseline.py
@@ -72,3 +72,14 @@ def test_baseline_receipt_marks_noninteractive_utf8_boundaries() -> None:
     assert 'utf8Output = $true' in source
     assert 'telegramNotificationSent = $false' in source
     assert 'kmRagWritebackPerformed = $false' in source
+
+
+def test_baseline_normalizes_windows_collection_and_keyboard_objects() -> None:
+    source = _source()
+
+    assert "foreach ($language in $languageList)" in source
+    assert '$override.PSObject.Properties["InputMethodTip"]' in source
+    assert "Get-DefaultInputMethodTip" in source
+    assert "Test-WindowsControlSnapshot $independentReadback.snapshot $before -IndependentProcess" in source
+    assert "uiCulture = [string]$Snapshot.uiCulture" not in source
+    assert "([string]$Snapshot.userName).ToLowerInvariant()" in source