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

    Fault : "The trust relationship between this workstation and the primary domain failed"
    Fix   : Rule out the causes that look identical
    Source: https://jbtecwiz.com/support/win-sec-trust-relationship

    Run as     : Elevated PowerShell
    Expect     : 30 minutes
    Risk       : low
    Reversible : yes

    WHEN THIS IS THE RIGHT FIX
    The repair failed, or nothing explains why it broke.

    HOW TO UNDO IT
    Nothing destructive was done. A deleted duplicate object can be restored
    from the AD Recycle Bin if enabled.

    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

# - THIS SCRIPT WILL NOT RUN UNTIL YOU EDIT IT -
# The commands below contain values only you can supply. Search the
# script for each one, replace it, then delete this block.
$script:MustEdit = @(
    'yourdomain'   # a placeholder hostname
)
if ($script:MustEdit.Count) {
    Write-Host ""
    Write-Host '  This script needs editing before it can run.' -ForegroundColor Yellow
    Write-Host '  Replace each of these with a real value:' -ForegroundColor Yellow
    $script:MustEdit | ForEach-Object { Write-Host ("    " + $_) -ForegroundColor Yellow }
    Write-Host ""
    Write-Host '  Then delete the $script:MustEdit block near the top.'
    Write-Host ""
    exit 2
}

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 '  "The trust relationship between this workstation and the primary domain failed"' -ForegroundColor White
Write-Host '  Rule out the causes that look identical' -ForegroundColor Cyan
Write-Host ''
Write-Host '  Risk: low   Reversible   30 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 'Check for a duplicate computer object in the directory -- two objects with the same name is a common cause after a rebuild.' -Command {
    Get-ADComputer -Filter { Name -like 'LAPTOP01*' } -Properties whenCreated,PasswordLastSet | Format-Table Name,DistinguishedName,whenCreated,PasswordLastSet
}

Invoke-Step -Number 2 -Do 'Check the machine can reach a domain controller at all -- a DNS fault produces the same message.' -Why '"Trust relationship failed" is also what Windows says when it cannot find a domain controller to ask. Confirming the machine can locate one separates a broken account from a broken network in one command.' -Command {
    nltest /dsgetdc:yourdomain.local
    Resolve-DnsName -Type SRV _ldap._tcp.dc._msdcs.yourdomain.local
}

Invoke-Step -Number 3 -Do 'Check the time. More than five minutes of skew breaks Kerberos and presents identically.' -Command {
    w32tm /query /status
    w32tm /stripchart /computer:DC01 /samples:3 /dataonly
}

Invoke-Step -Number 4 -Do 'Only if the object is genuinely wrong, reset it in the directory and repair from the client.' -Command {
    Get-ADComputer LAPTOP01 | Reset-ComputerMachinePassword -ErrorAction SilentlyContinue
    dsmod computer 'CN=LAPTOP01,OU=Computers,DC=yourdomain,DC=local' -reset
}

Write-Rule "  Confirm it worked"
Show-Prose 'nltest and Test-ComputerSecureChannel both succeed and sign-in works.' '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-sec-trust-relationship' 'Yellow'
} else {
    Write-Host '  Finished.' -ForegroundColor Green
}
Write-Host ''
Show-Prose 'To undo: Nothing destructive was done. A deleted duplicate object can be restored from the AD Recycle Bin if enabled.' 'DarkGray'
Write-Rule