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

    Fault : 0xC1900208 -- an incompatible application is blocking the upgrade
    Fix   : Read the compatibility report and clear the blocker
    Source: https://jbtecwiz.com/support/win-0xc1900208

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

    WHEN THIS IS THE RIGHT FIX
    The upgrade will not start. Find the blocker before uninstalling
    anything on suspicion.

    HOW TO UNDO IT
    Reinstall the application after the upgrade if it has a compatible
    version.

    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 '  0xC1900208 -- an incompatible application is blocking the upgrade' -ForegroundColor White
Write-Host '  Read the compatibility report and clear the blocker' -ForegroundColor Cyan
Write-Host ''
Write-Host '  Risk: medium   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 'Run the compatibility scan on its own from mounted media -- it writes a report without attempting the upgrade.' -Why 'ScanOnly is the whole point: it produces the same verdict as a real attempt in a few minutes and cannot leave the machine half-upgraded.' -Command {
    cmd.exe /c 'D:\setup.exe /Auto Upgrade /Compat ScanOnly /MigrateDrivers All /DynamicUpdate Disable /copylogs C:\temp\compat'
}

Invoke-Step -Number 2 -Do 'Read the result. The blocker is named in the setup logs it copied out.' -Command {
    Select-String -Path C:\temp\compat\*.xml, C:\temp\compat\*\*.log -Pattern 'BlockingApplication|CompatBlock|HardBlock' | Select-Object -First 20
}

Invoke-Step -Number 3 -Do 'Also check the panther log, which records the same decision in plain text.' -Command {
    Select-String -Path C:\`$WINDOWS.~BT\Sources\Panther\setupact.log -Pattern 'CONX|Block' | Select-Object -Last 30
}

Invoke-Step -Number 4 -Do 'Uninstall the named application with the vendor''s own removal tool. For disk encryption, decrypt the volume first -- do not simply uninstall it.' -Why 'Removing an encryption driver while the volume is still encrypted leaves data that nothing on the machine can read.' -Manual

Invoke-Step -Number 5 -Do 'Retry the upgrade from mounted media rather than Windows Update.' -Manual

Write-Rule "  Confirm it worked"
Show-Prose 'A second ScanOnly pass reports no blocking applications.' '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-0xc1900208' 'Yellow'
} else {
    Write-Host '  Finished.' -ForegroundColor Green
}
Write-Host ''
Show-Prose 'To undo: Reinstall the application after the upgrade if it has a compatible version.' 'DarkGray'
Write-Rule