DISM /ScanHealth leaks WinSxS\Temp\InFlight data on Windows 11 25H2 Build 26200.9457

Hi David,

Please make sure to file this

issue in the Feedback Hub so

the Engineering team gets the data.

Proposed workaround as powershell script to clean cache until this issue is fixed,

# =========================================================================
# CHECK CBS/TrustedInstaller IS IDLE, THEN TAKE OWNERSHIP AND CLEAR InFlight
# Run this AFTER a reboot, once you've confirmed cache growth (>500MB) persists
# =========================================================================
# --- 1. Confirm TrustedInstaller service is stopped ---
$tiService = Get-Service TrustedInstaller
Write-Host "TrustedInstaller service status: $($tiService.Status)" -ForegroundColor Cyan
if ($tiService.Status -ne 'Stopped') {
    Write-Host "TrustedInstaller is still running. Waiting 2 minutes and rechecking..." -ForegroundColor Yellow
    Start-Sleep -Seconds 120
    $tiService = Get-Service TrustedInstaller
    Write-Host "Rechecked status: $($tiService.Status)" -ForegroundColor Cyan
}
# --- 2. Confirm no TiWorker process is active ---
$tiWorker = Get-Process TiWorker -ErrorAction SilentlyContinue
if ($tiWorker) {
    Write-Host "TiWorker is still running (PID $($tiWorker.Id), StartTime $($tiWorker.StartTime)). Not safe to proceed." -ForegroundColor Red
    return
} else {
    Write-Host "TiWorker not running. Confirmed idle." -ForegroundColor Green
}
# --- 3. Only proceed if TrustedInstaller is stopped ---
if ($tiService.Status -eq 'Stopped') {
    Write-Host "`nSystem is idle. Proceeding with InFlight cleanup." -ForegroundColor Cyan
    # Take ownership of InFlight and everything inside it
    takeown /F "C:\Windows\WinSxS\Temp\InFlight" /R /D Y
    # Grant Administrators full control
    icacls "C:\Windows\WinSxS\Temp\InFlight" /grant Administrators:F /T /C
    # Delete contents (folder itself remains, only contents removed)
    Get-ChildItem "C:\Windows\WinSxS\Temp\InFlight" -Force | Remove-Item -Recurse -Force -ErrorAction Stop
    # Verify
    $remaining = Get-ChildItem "C:\Windows\WinSxS\Temp\InFlight" -Recurse -Force -ErrorAction SilentlyContinue |
        Measure-Object -Property Length -Sum
    Write-Host "`nRemaining size in InFlight: $([math]::Round($remaining.Sum / 1MB, 2)) MB" -ForegroundColor Green
    # Confirm system health afterward
    Write-Host "`nRunning SFC to confirm nothing was disturbed..." -ForegroundColor Cyan
    sfc /scannow
} else {
    Write-Host "`nTrustedInstaller still not stopped after wait. Aborting - do not proceed manually until it's idle." -ForegroundColor Red
}