PoshBotHLC

1.3.0

Public/Invoke-Update.ps1

function Invoke-Update {
    <#
    .SYNOPSIS
        Invokes windows updates for target computer
    .PARAMETER Computer
        Target user
    .EXAMPLE
        !Update SSCN115
    #>
    [PoshBot.BotCommand(
        CommandName = 'Update',
        Aliases = ('Updates', 'WindowsUpdate', 'Invoke-Update')
    )]
    [CmdletBinding()]
    param (
        [parameter(Mandatory = $true, Position = 1)]
        [string[]]$computer
    )

    ForEach ($c in $computer) {
        #install pswindows updates module on remote machine
        $nugetinstall = invoke-command -ComputerName $c -ScriptBlock { Install-PackageProvider -Name NuGet -MinimumVersion 2.8.5.201 -Force }
        $nugetinstall
        try {
            invoke-command -ComputerName $c -ScriptBlock { install-module pswindowsupdate -force }
        }
        catch {

        }
        invoke-command -ComputerName $c -ScriptBlock { Import-Module PSWindowsUpdate -force }
        Do {
            #Reset Timeouts
            $connectiontimeout = 0
            $updatetimeout = 0

            #starts up a remote powershell session to the computer
            do {
                $session = New-PSSession -ComputerName $c
                "reconnecting remotely to $c"
                Start-Sleep -seconds 10
                $connectiontimeout++
            } until ($session.state -match "Opened" -or $connectiontimeout -ge 15)

            #retrieves a list of available updates
            "Checking for new updates available on $c"
            $updates = invoke-command -session $session -scriptblock { Get-wulist -verbose }

            #counts how many updates are available
            $updatenumber = ($updates.kb).count

            #if there are available updates proceed with installing the updates and then reboot the remote machine
            if ($updates -ne $null) {

                #remote command to install windows updates, creates a scheduled task on remote computer
                invoke-command -ComputerName $c -ScriptBlock { Invoke-WUjob -ComputerName localhost -Script "ipmo PSWindowsUpdate; Install-WindowsUpdate -AcceptAll | Out-File C:\PSWindowsUpdate.log" -Confirm:$false -RunNow }

                #Show update status until the amount of installed updates equals the same as the amount of updates available
                sleep -Seconds 30

                do {
                    $updatestatus = Get-Content \\$c\c$\PSWindowsUpdate.log
                    "Currently processing the following update:"
                    Get-Content \\$c\c$\PSWindowsUpdate.log | select-object -last 1
                    $updatestatus
                    sleep -Seconds 10

                    $ErrorActionPreference = 'SilentlyContinue'
                    $installednumber = ([regex]::Matches($updatestatus, "Installed" )).count
                    $Failednumber = ([regex]::Matches($updatestatus, "Failed" )).count
                    $ErrorActionPreference = 'Continue'
                    $updatetimeout++
                }until ( ($installednumber + $Failednumber) -eq $updatenumber -or $updatetimeout -ge 720)

                #restarts the remote computer and waits till it starts up again
                "restarting remote computer"

                #removes schedule task from computer
                invoke-command -computername $c -ScriptBlock { Unregister-ScheduledTask -TaskName PSWindowsUpdate -Confirm:$false }

                # rename update log
                $date = Get-Date -Format "MM-dd-yyyy_hh-mm-ss"
                Rename-Item \\$c\c$\PSWindowsUpdate.log -NewName "WindowsUpdate-$date.log"
                Restart-Computer -Wait -ComputerName $c -Force
            }
        }until($null -eq $updates)

        "Windows is now up to date on $c"
    }
}