#Requires -Version 5.1
<#
    JbTecWiz Support Centre -- generated fix script

    Fault : STOP 0x000000EF -- CRITICAL_PROCESS_DIED
    Fix   : Repair the system files and check the disk
    Source: https://jbtecwiz.com/support/win-0xef

    Run as     : Elevated PowerShell
    Expect     : 45 minutes
    Risk       : low
    Reversible : yes

    WHEN THIS IS THE RIGHT FIX
    Windows starts, even if only in Safe Mode.

    HOW TO UNDO IT
    Re-enable any service you disabled.

    This script walks the fix one step at a time and asks before each
    one. Steps with no command are things you do yourself -- it prints
    those and waits. Run with -DryRun to print without executing.

    --------------------------------------------------------------------
    NO WARRANTY - USE AT YOUR OWN RISK

    This script is provided by JbTecWiz as-is and with no warranty of any
    kind, express or implied. You run it entirely at your own risk.

    JbTecWiz accepts no liability for any loss or damage arising from its
    use, including but not limited to data loss, downtime, or configuration
    changes that turn out to be wrong for your system.

    You are responsible for reading this script before running it, for
    satisfying yourself that it suits the machine in front of you, and for
    having a working backup first. Some steps cannot be undone.
    --------------------------------------------------------------------
#>

[CmdletBinding()]
param(
    # Print every step and command without running anything.
    [switch]$DryRun,
    # Do not ask before each step. Read the script first if you use this.
    [switch]$Unattended
)

$ErrorActionPreference = 'Stop'
$script:Failed = 0

function Write-Rule { param([string]$Text)
    Write-Host ''
    Write-Host ('-' * 70) -ForegroundColor DarkGray
    if ($Text) { Write-Host $Text -ForegroundColor Cyan }
}

function Show-Prose { param([string]$Text, [string]$Colour = "Gray")
    if (-not $Text) { return }
    $words = $Text -split "\s+"; $line = "  "
    foreach ($w in $words) {
        if (($line.Length + $w.Length) -gt 74) { Write-Host $line -ForegroundColor $Colour; $line = "  " }
        $line += "$w "
    }
    if ($line.Trim()) { Write-Host $line -ForegroundColor $Colour }
}

function Invoke-Step {
    param(
        [int]$Number, [string]$Do, [string]$Why,
        [scriptblock]$Command, [switch]$Manual, [string]$Shell = "powershell"
    )
    Write-Rule "  Step $Number of 5"
    Show-Prose $Do "White"
    if ($Why) { Write-Host ""; Show-Prose $Why "DarkGray" }

    if ($Manual) {
        Write-Host ''
        Write-Host '  -> Do this yourself, then press Enter to carry on.' -ForegroundColor Yellow
        if (-not $Unattended -and -not $DryRun) { [void](Read-Host) }
        return
    }

    Write-Host ''
    foreach ($l in ($Command.ToString().Trim() -split "`n")) {
        Write-Host ("    " + $l.Trim()) -ForegroundColor Green
    }
    Write-Host ''

    if ($DryRun) { Write-Host "  (dry run -- not executed)" -ForegroundColor DarkGray; return }
    if (-not $Unattended) {
        $a = Read-Host "  Run this step? [Y]es / [S]kip / [Q]uit"
        if ($a -match "^[Qq]") { Write-Host "  Stopped at your request."; exit 0 }
        if ($a -match "^[Ss]") { Write-Host "  Skipped." -ForegroundColor DarkGray; return }
    }
    try { & $Command }
    catch {
        $script:Failed++
        Write-Host ("  Step $Number failed: " + $_.Exception.Message) -ForegroundColor Red
        Show-Prose "The rest of the fix may depend on this. Read the write-up before carrying on." "Red"
        if (-not $Unattended) {
            $c = Read-Host "  Carry on anyway? [y/N]"
            if ($c -notmatch "^[Yy]") { exit 1 }
        }
    }
}

Write-Rule
Write-Host '  STOP 0x000000EF -- CRITICAL_PROCESS_DIED' -ForegroundColor White
Write-Host '  Repair the system files and check the disk' -ForegroundColor Cyan
Write-Host ''
Write-Host '  Risk: low   Reversible   45 minutes'
Write-Host ''
Show-Prose 'No warranty. Use at your own risk - JbTecWiz accepts no liability. Read it before you run it, and have a backup.' 'DarkYellow'
Write-Rule

if (-not $Unattended -and -not $DryRun) {
    $go = Read-Host '  Ready? [y/N]'
    if ($go -notmatch "^[Yy]") { Write-Host "  Nothing was changed."; exit 0 }
}

Invoke-Step -Number 1 -Do 'Repair the component store, then the system files, in that order.' -Why 'SFC repairs from the component store, so repairing the store first is what makes SFC able to fix anything.' -Command {
    DISM /Online /Cleanup-Image /RestoreHealth
    sfc /scannow
}

Invoke-Step -Number 2 -Do 'Check the disk''s own health before assuming software.' -Command {
    Get-PhysicalDisk | Format-Table FriendlyName, MediaType, HealthStatus, OperationalStatus -AutoSize
    Get-StorageReliabilityCounter -PhysicalDisk (Get-PhysicalDisk) | Format-Table DeviceId, Wear, ReadErrorsTotal, UncorrectedReadErrors -AutoSize
}

Invoke-Step -Number 3 -Do 'Schedule a full disk check.' -Command {
    cmd.exe /c 'chkdsk C: /f /r'
}

Invoke-Step -Number 4 -Do 'Find which process died -- the dump names it.' -Command {
    Get-WinEvent -FilterHashtable @{LogName='System'; Id=1001} -MaxEvents 5 | Format-List TimeCreated, Message
}

Invoke-Step -Number 5 -Do 'If a third-party service is implicated, disable it and test.' -Command {
    Get-Service | Where-Object { $_.Status -eq 'Running' } | Select-Object Name, DisplayName | Sort-Object DisplayName
}

Write-Rule "  Confirm it worked"
Show-Prose 'No further bugchecks over several days, and sfc reports no violations.' 'White'

Write-Rule
if ($script:Failed -gt 0) {
    Write-Host ("  Finished with " + $script:Failed + " failed step(s).") -ForegroundColor Yellow
    Show-Prose 'Read the full write-up at https://jbtecwiz.com/support/win-0xef' 'Yellow'
} else {
    Write-Host '  Finished.' -ForegroundColor Green
}
Write-Host ''
Show-Prose 'To undo: Re-enable any service you disabled.' 'DarkGray'
Write-Rule