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

    Fault : 0x80070005 -- access denied during update or activation
    Fix   : Restore the default permissions on the update paths
    Source: https://jbtecwiz.com/support/win-0x80070005-update

    Run as     : Elevated PowerShell
    Expect     : 25 minutes
    Risk       : medium
    Reversible : NO -- read the undo note below before running

    WHEN THIS IS THE RIGHT FIX
    Updates or activation fail with access denied. Note that resetting ACLs
    cannot be undone in place -- export them first.

    HOW TO UNDO IT
    icacls C:\Windows\SoftwareDistribution /restore C:\temp\sd-acl.txt

    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 6"
    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 '  0x80070005 -- access denied during update or activation' -ForegroundColor White
Write-Host '  Restore the default permissions on the update paths' -ForegroundColor Cyan
Write-Host ''
Write-Host '  Risk: medium   NOT REVERSIBLE   25 minutes' -ForegroundColor Yellow
Write-Host ''
Show-Prose 'Undo: icacls C:\Windows\SoftwareDistribution /restore C:\temp\sd-acl.txt' 'Yellow'
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 'Record the current ACLs before changing anything.' -Why 'icacls /restore replays these files exactly. Without them there is no way back to whatever the hardening baseline set.' -Command {
    cmd.exe /c 'icacls C:\Windows\SoftwareDistribution /save C:\temp\sd-acl.txt /T & icacls C:\Windows\System32\catroot2 /save C:\temp\catroot2-acl.txt /T'
}

Invoke-Step -Number 2 -Do 'Temporarily disable real-time antivirus scanning and retry once -- if it works, the fix is an exclusion, not an ACL change.' -Manual

Invoke-Step -Number 3 -Do 'Reset the ownership and permissions on the update folders.' -Command {
    cmd.exe /c 'takeown /F C:\Windows\SoftwareDistribution /R /D Y & icacls C:\Windows\SoftwareDistribution /reset /T /C'
}

Invoke-Step -Number 4 -Do 'Do the same for the catalogue store.' -Command {
    cmd.exe /c 'takeown /F C:\Windows\System32\catroot2 /R /D Y & icacls C:\Windows\System32\catroot2 /reset /T /C'
}

Invoke-Step -Number 5 -Do 'Confirm the update services run as the accounts they should.' -Command {
    Get-CimInstance Win32_Service -Filter "Name='wuauserv' or Name='bits' or Name='cryptsvc'" | Format-Table Name, StartName, State -AutoSize
}

Invoke-Step -Number 6 -Do 'Restart and retry.' -Manual

Write-Rule "  Confirm it worked"
Show-Prose 'Updates scan and install.' '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-0x80070005-update' 'Yellow'
} else {
    Write-Host '  Finished.' -ForegroundColor Green
}
Write-Host ''
Show-Prose 'To undo: icacls C:\Windows\SoftwareDistribution /restore C:\temp\sd-acl.txt' 'DarkGray'
Write-Rule