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

    Fault : 0x80073712 / 0x800f081f -- component store corruption or missing source
    Fix   : Repair from a mounted ISO instead
    Source: https://jbtecwiz.com/support/win-cbs-corruption

    Run as     : Elevated PowerShell
    Expect     : 20-40 minutes
    Risk       : low
    Reversible : yes

    WHEN THIS IS THE RIGHT FIX
    No path to Windows Update, or WSUS is intercepting and does not carry
    the payload. The ISO build must match the installed build.

    HOW TO UNDO IT
    None needed.

    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 '  0x80073712 / 0x800f081f -- component store corruption or missing source' -ForegroundColor White
Write-Host '  Repair from a mounted ISO instead' -ForegroundColor Cyan
Write-Host ''
Write-Host '  Risk: low   Reversible   20-40 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 'Download the ISO for exactly the build installed. Check what that is first.' -Why 'DISM refuses a source from a different build, and a mismatched source is the most common reason this fix appears not to work.' -Command {
    Get-ComputerInfo -Property OsName, OsVersion, OsBuildNumber
}

Invoke-Step -Number 2 -Do 'Mount the ISO and note the drive letter it gets.' -Command {
    Mount-DiskImage -ImagePath C:\iso\windows.iso
}

Invoke-Step -Number 3 -Do 'Point DISM at install.wim inside it. Index 1 is usually correct; check with Get-WindowsImage if the repair reports the wrong edition.' -Why '/LimitAccess stops DISM falling back to Windows Update, which is what makes the failure explicit rather than silent.' -Command {
    DISM /Online /Cleanup-Image /RestoreHealth /Source:WIM:E:\sources\install.wim:1 /LimitAccess
}

Invoke-Step -Number 4 -Do 'Run SFC afterwards.' -Command {
    sfc /scannow
}

Invoke-Step -Number 5 -Do 'Unmount the ISO.' -Command {
    Dismount-DiskImage -ImagePath C:\iso\windows.iso
}

Write-Rule "  Confirm it worked"
Show-Prose 'The feature installs, or the update applies. CBS.log has no new payload-missing entries.' 'White'
Write-Host ''
if (-not $DryRun) {
    Select-String -Path C:\Windows\Logs\CBS\CBS.log -Pattern 'payload|corrupt' | Select-Object -Last 20
}

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-cbs-corruption' 'Yellow'
} else {
    Write-Host '  Finished.' -ForegroundColor Green
}
Write-Host ''
Show-Prose 'To undo: None needed.' 'DarkGray'
Write-Rule