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

    Fault : Camera error 0xA00F4244 -- "We can't find your camera"
    Fix   : Reinstate the camera device
    Source: https://jbtecwiz.com/support/win-hw-camera

    Run as     : Elevated PowerShell
    Expect     : 20 minutes
    Risk       : medium
    Reversible : yes

    WHEN THIS IS THE RIGHT FIX
    It is missing from Device Manager or shows an error.

    HOW TO UNDO IT
    Disable-PnpDevice returns it to its previous state if it was disabled
    deliberately.

    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 '  Camera error 0xA00F4244 -- "We can''t find your camera"' -ForegroundColor White
Write-Host '  Reinstate the camera device' -ForegroundColor Cyan
Write-Host ''
Write-Host '  Risk: medium   Reversible   20 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 'Look for it, including hidden devices -- a disabled camera hides by default.' -Command {
    Get-PnpDevice -Class Camera,Image -Status OK,Error,Unknown | Format-Table Status,Class,FriendlyName,InstanceId
}

Invoke-Step -Number 2 -Do 'If it is disabled, enable it.' -Command {
    Get-PnpDevice -Class Camera | Where-Object Status -eq 'Error' | Enable-PnpDevice -Confirm:$false
}

Invoke-Step -Number 3 -Do 'If it is absent entirely, check the BIOS -- most business laptops can disable the camera at firmware level, and it then does not exist as far as Windows is concerned.' -Why 'A camera disabled in firmware produces exactly the same error as a driver fault, and no amount of work in Windows will find it. Checking the BIOS takes two minutes and rules out the invisible cause.' -Manual

Invoke-Step -Number 4 -Do 'Reinstall the manufacturer''s camera and chipset drivers, and run a scan for hardware changes.' -Command {
    cmd.exe /c 'pnputil /scan-devices'
}

Write-Rule "  Confirm it worked"
Show-Prose 'The camera appears with status OK.' 'White'
Write-Host ''
if (-not $DryRun) {
    Get-PnpDevice -Class Camera | Format-Table FriendlyName,Status,Problem
}

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-hw-camera' 'Yellow'
} else {
    Write-Host '  Finished.' -ForegroundColor Green
}
Write-Host ''
Show-Prose 'To undo: Disable-PnpDevice returns it to its previous state if it was disabled deliberately.' 'DarkGray'
Write-Rule