New Tool: Get the Latest Windows 10 Cumulative Updates!

TL;DR – Programmatically get the latest Windows 10 Cumulative Updates!

Got a request from someone on an internal e-mail Distribution list recently, asking how to find out the latest Windows 10 (or Windows Server 2016) Cumulative Update.

Normally you can find these updates by going to this Microsoft KB article, then finding the right Operating System Version. Then you use the KB article number to go to Windows Update, and find the correct download link, then download the file.

I wanted to update this for another project, so I took it as a challenge to code in PowerShell.

New Tool

For this tool, I placed the source code up on GitHub.com, in a new gist. A gist is just a file that can be edited, version controlled, and shared out publicly on the GitHub.com site.

Given a Windows Version (build number), and a couple other search strings, will programmatically determine what the correct download links are for this Windows 10 (or Windows Server 2016).Â

The output can also be piped into BITS so you can just download locally.

Example

Get the links for the latest Windows 10 Version 1703 Updates:

 

Additionally we can also download the files using the BITS command Start-BITSTransfer

 

Source

	<#
	.SYNOPSIS
	Get the latest Cumulative update for Windows
	.DESCRIPTION
	This script will return the list of Cumulative updates for Windows 10 and Windows Server 2016 from the Microsoft Update Catalog.
	.NOTES
	Copyright Keith Garner (KeithGa@DeploymentLive.com), All rights reserved.
	.LINK
	https://support.microsoft.com/en-us/help/4000823
	.EXAMPLE
	Get the latest Cumulative Update for Windows 10 x64
	.\Get-LatestUpdate.ps1
	.PARAMETER Build
	Windows 10 Build Number used to filter avaible Downloads
	10240 – Windows 10 Version 1507
	10586 – Windows 10 Version 1511
	14393 – Windows 10 Version 1607 and Windows Server 2016
	15063 – Windows 10 Version 1703
	16299 – WIndows 10 Version 1709
	.PARAMETER Filter
	Specify a specific search filter to change the target update behaviour. The default will only Cumulative updates for x86 and x64.
	If Mulitple Filters are specified, only string that match *ALL* filters will be selected.
	Cumulative – Download Cumulative updates.
	Delta – Download Delta updates.
	x86 – Download x86
	x64 – Download x64
	.EXAMPLE
	Get the latest Cumulative Update for Windows 10 x86
	.\Get-LatestUpdate.ps1 -Filter 'Cumulative','x86'
	.EXAMPLE
	Get the latest Cumulative Update for Windows Server 2016
	.\Get-LatestUpdate.ps1 -Filter 'Cumulative','x64' -Build 14393
	.EXAMPLE
	Get the latest Cumulative Updates for Windows 10 (both x86 and x64) and download to the %TEMP% directory.
	.\Get-LatestUpdate.ps1 | Start-BitsTransfer -Destination $env:Temp
	#>
	[CmdletBinding()]
	Param(
	[Parameter(Mandatory=$False, HelpMessage="JSON source for the update KB articles.")]
	[string] $StartKB = 'https://support.microsoft.com/app/content/api/content/asset/en-us/4000816',
	[Parameter(Mandatory=$False, HelpMessage="Windows build number.")]
	[ValidateSet('16299','15063','14393','10586','10240')]
	[string] $BUild = '16299',
	[Parameter(Mandatory=$False, HelpMessage="Windows update Catalog Search Filter.")]
	[ValidateSet('x64','x86','Cumulative','Delta',$null)]
	[string[]] $Filter = @( "Cumulative" )
	)
	#region Support Routine
	Function Select-LatestUpdate {
	[CmdletBinding(SupportsShouldProcess=$True)]
	Param(
	[Parameter(Mandatory=$true, ValueFromPipeline=$true)]
	$Updates
	)
	Begin {
	$MaxObject = $null
	$MaxValue = [version]::new("0.0")
	}
	Process {
	ForEach ( $Update in $updates ) {
	Select-String –InputObject $Update –AllMatches –Pattern "(\d+\.)?(\d+\.)?(\d+\.)?(\*|\d+)" |
	ForEach-Object { $_.matches.value } |
	ForEach-Object { $_ -as [version] } |
	ForEach-Object {
	if ( $_ -gt $MaxValue ) { $MaxObject = $Update; $MaxValue = $_ }
	}
	}
	}
	End {
	$MaxObject | Write-Output
	}
	}
	#endregion
	#region Find the KB Article Number
	Write-Verbose "Downloading $StartKB to retrieve the list of updates."
	$kbID = Invoke-WebRequest –Uri $StartKB |
	Select-Object –ExpandProperty Content |
	ConvertFrom-Json |
	Select-Object –ExpandProperty Links |
	Where-Object level -eq 2 |
	Where-Object text -match $BUild |
	Select-LatestUpdate |
	Select-Object –First 1
	#endregion
	#region get the download link from Windows Update
	Write-Verbose "Found ID: KB$($kbID.articleID)"
	$kbObj = Invoke-WebRequest –Uri "http://www.catalog.update.microsoft.com/Search.aspx?q=KB$($KBID.articleID)"
	$Available_KBIDs = $kbObj.InputFields |
	Where-Object { $_.type -eq 'Button' -and $_.Value -eq 'Download' } |
	Select-Object –ExpandProperty ID
	$Available_KBIDs | out-string | write-verbose
	$kbGUIDs = $kbObj.Links |
	Where-Object ID -match '_link' |
	Where-Object { $_.OuterHTML -match ( "(?=.*" + ( $Filter -join ")(?=.*" ) + ")" ) } |
	ForEach-Object { $_.id.replace('_link','') } |
	Where-Object { $_ -in $Available_KBIDs }
	foreach ( $kbGUID in $kbGUIDs )
	{
	Write-Verbose "`t`tDownload $kbGUID"
	$Post = @{ size = 0; updateID = $kbGUID; uidInfo = $kbGUID } | ConvertTo-Json –Compress
	$PostBody = @{ updateIDs = "[$Post]" }
	Invoke-WebRequest –Uri 'http://www.catalog.update.microsoft.com/DownloadDialog.aspx' –Method Post –Body $postBody |
	Select-Object –ExpandProperty Content |
	Select-String –AllMatches –Pattern "(http[s]?\://download\.windowsupdate\.com\/[^\'\""]*)" |
	Select-Object –Unique |
	ForEach-Object { [PSCustomObject] @{ Source = $_.matches.value } } # Output for BITS
	}
	#endregion

view raw

Get-LatestUpdate.ps1

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