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

    Fault : 0x0000011b -- cannot connect to a shared printer after the print security updates
    Fix   : Bring the print server and clients to the same patch level
    Source: https://jbtecwiz.com/support/win-printnightmare-11b

    Run as     : Elevated PowerShell
    Expect     : 1-2 hours
    Risk       : low
    Reversible : yes

    WHEN THIS IS THE RIGHT FIX
    The supported fix. Do the server first.

    HOW TO UNDO IT
    None needed -- this is the intended configuration.

    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 '  0x0000011b -- cannot connect to a shared printer after the print security updates' -ForegroundColor White
Write-Host '  Bring the print server and clients to the same patch level' -ForegroundColor Cyan
Write-Host ''
Write-Host '  Risk: low   Reversible   1-2 hours'
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 'Patch the print server fully and restart it.' -Manual

Invoke-Step -Number 2 -Do 'Confirm the spooler is running and the shares are published.' -Command {
    Get-Service Spooler
    Get-Printer | Where-Object Shared | Format-Table Name, ShareName, DriverName -AutoSize
}

Invoke-Step -Number 3 -Do 'Make sure the drivers on the server are v3 packaged or v4 drivers -- unpackaged v3 drivers are refused by the hardened path.' -Why 'The hardening will not install a driver from the server that is not packaged, and the client-side failure looks identical to the RPC one.' -Command {
    Get-PrinterDriver | Format-Table Name, MajorVersion, PrinterEnvironment -AutoSize
}

Invoke-Step -Number 4 -Do 'Patch the clients fully and restart.' -Manual

Invoke-Step -Number 5 -Do 'Remove and re-add the printer connection on one client to test.' -Command {
    Remove-Printer -Name '\\PRINTSRV\HP-Reception'
    Add-Printer -ConnectionName '\\PRINTSRV\HP-Reception'
}

Write-Rule "  Confirm it worked"
Show-Prose 'A test page prints from a client with no elevation prompt.' 'White'
Write-Host ''
if (-not $DryRun) {
    Get-Printer -Name '\\PRINTSRV\HP-Reception' | Format-List Name, PrinterStatus
}

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-printnightmare-11b' 'Yellow'
} else {
    Write-Host '  Finished.' -ForegroundColor Green
}
Write-Host ''
Show-Prose 'To undo: None needed -- this is the intended configuration.' 'DarkGray'
Write-Rule