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

    Fault : A legitimate application is being blocked or quarantined
    Fix   : Deal with a SmartScreen block on an unsigned application
    Source: https://jbtecwiz.com/support/win-app-defender-block

    Run as     : The download itself
    Expect     : 10 minutes
    Risk       : medium
    Reversible : yes

    WHEN THIS IS THE RIGHT FIX
    "Windows protected your PC" on an installer you obtained deliberately.

    HOW TO UNDO IT
    Nothing system-wide was changed.

    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 '  A legitimate application is being blocked or quarantined' -ForegroundColor White
Write-Host '  Deal with a SmartScreen block on an unsigned application' -ForegroundColor Cyan
Write-Host ''
Write-Host '  Risk: medium   Reversible   10 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 'Verify the download before bypassing anything -- check it came from the vendor''s own site over HTTPS, and compare its hash against the one the vendor publishes.' -Command {
    Get-FileHash "$env:USERPROFILE\Downloads\setup.exe" -Algorithm SHA256
}

Invoke-Step -Number 2 -Do 'Check who signed it. An unsigned installer from a small vendor is normal; an unsigned installer claiming to be from a large one is not.' -Why 'SmartScreen warns on files it has not seen often, which includes every genuinely new release from a small developer. The signature and the hash are what separate that from something that has been tampered with.' -Command {
    Get-AuthenticodeSignature "$env:USERPROFILE\Downloads\setup.exe" | Format-List Status,SignerCertificate,StatusMessage
}

Invoke-Step -Number 3 -Do 'If it checks out, choose More info -> Run anyway, or clear the mark of the web on the file.' -Command {
    Unblock-File "$env:USERPROFILE\Downloads\setup.exe"
}

Invoke-Step -Number 4 -Do 'Do not disable SmartScreen to install one application.' -Manual

Write-Rule "  Confirm it worked"
Show-Prose 'The installer runs, and SmartScreen remains enabled.' 'White'
Write-Host ''
if (-not $DryRun) {
    Get-MpPreference | Format-List EnableNetworkProtection
}

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-defender-block' 'Yellow'
} else {
    Write-Host '  Finished.' -ForegroundColor Green
}
Write-Host ''
Show-Prose 'To undo: Nothing system-wide was changed.' 'DarkGray'
Write-Rule