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

    Fault : An application will not start -- 0xc0000142, 0xc000007b, 0xc0000005
    Fix   : Resolve the architecture mismatch
    Source: https://jbtecwiz.com/support/win-app-launch-0xc0000142

    Run as     : Elevated PowerShell
    Expect     : 30 minutes
    Risk       : medium
    Reversible : yes

    WHEN THIS IS THE RIGHT FIX
    0xc000007b specifically. This code means bitness, essentially always.

    HOW TO UNDO IT
    Keep a copy of any DLL removed from the application folder until it is
    proven unnecessary.

    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 4"
    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 '  An application will not start -- 0xc0000142, 0xc000007b, 0xc0000005' -ForegroundColor White
Write-Host '  Resolve the architecture mismatch' -ForegroundColor Cyan
Write-Host ''
Write-Host '  Risk: medium   Reversible   30 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 'Establish whether the executable is 32 or 64-bit.' -Why '8664 is x64, 014C is x86, AA64 is ARM64. Knowing which you have decides which runtime to install and stops the guessing that makes this fault take an afternoon.' -Command {
    $p='C:\Program Files\App\app.exe'
    $fs=[IO.File]::OpenRead($p);$br=New-Object IO.BinaryReader($fs)
    $fs.Seek(0x3C,'Begin')|Out-Null;$peOff=$br.ReadInt32()
    $fs.Seek($peOff+4,'Begin')|Out-Null
    '{0:X4}' -f $br.ReadUInt16()
    $br.Close()
}

Invoke-Step -Number 2 -Do 'Install the matching runtime -- a 32-bit application needs the x86 redistributable regardless of the machine.' -Manual

Invoke-Step -Number 3 -Do 'Check for DLLs of the wrong architecture sitting in the application folder, usually copied there by a well-meaning fix from a forum. Remove them and let the application use the system copies.' -Manual

Invoke-Step -Number 4 -Do 'Reinstall the application cleanly if the folder has been tampered with.' -Manual

Write-Rule "  Confirm it worked"
Show-Prose 'The application launches and Process Explorer shows it loading DLLs from the expected directories.' '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-app-launch-0xc0000142' 'Yellow'
} else {
    Write-Host '  Finished.' -ForegroundColor Green
}
Write-Host ''
Show-Prose 'To undo: Keep a copy of any DLL removed from the application folder until it is proven unnecessary.' 'DarkGray'
Write-Rule