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Gets the current software update level of a Windows 10 workstation and compares with the latest available updates. Can also list all available updates for the current build.
[CmdletBinding()]
Param(
[switch]$ListAllAvailable,
[switch]$ExcludePreview,
[switch]$ExcludeOutofBand
)
$ProgressPreference = 'SilentlyContinue'
$URI = "https://aka.ms/WindowsUpdateHistory" # Windows 10 release history
Function Get-MyWindowsVersion {
[CmdletBinding()]
Param
(
$ComputerName = $env:COMPUTERNAME
)
$Table = New-Object System.Data.DataTable
$Table.Columns.AddRange(@("ComputerName","Windows Edition","Version","OS Build"))
$ProductName = (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' -Name ProductName).ProductName
Try
{
$Version = (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' -Name ReleaseID -ErrorAction Stop).ReleaseID
}
Catch
{
$Version = "N/A"
}
$CurrentBuild = (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' -Name CurrentBuild).CurrentBuild
$UBR = (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' -Name UBR).UBR
$OSVersion = $CurrentBuild + "." + $UBR
$TempTable = New-Object System.Data.DataTable
$TempTable.Columns.AddRange(@("ComputerName","Windows Edition","Version","OS Build"))
[void]$TempTable.Rows.Add($env:COMPUTERNAME,$ProductName,$Version,$OSVersion)
Return $TempTable
}
Function Convert-ParsedArray {
Param($Array)
$ArrayList = New-Object System.Collections.ArrayList
foreach ($item in $Array)
{
[void]$ArrayList.Add([PSCustomObject]@{
Update = $item.outerHTML.Split('>')[1].Replace('</a','').Replace('&#x2014;',' - ')
KB = "KB" + $item.href.Split('/')[-1]
InfoURL = "https://support.microsoft.com" + $item.href
OSBuild = $item.outerHTML.Split('(OS ')[1].Split()[1] # Just for sorting
})
}
Return $ArrayList
}
If ($PSVersionTable.PSVersion.Major -ge 6)
{
$Response = Invoke-WebRequest -Uri $URI -ErrorAction Stop
}
else
{
$Response = Invoke-WebRequest -Uri $URI -UseBasicParsing -ErrorAction Stop
}
If (!($Response.Links))
{ throw "Response was not parsed as HTML"}
$VersionDataRaw = $Response.Links | where {$_.outerHTML -match "supLeftNavLink" -and $_.outerHTML -match "KB"}
$CurrentWindowsVersion = Get-MyWindowsVersion -ErrorAction Stop
If ($ListAllAvailable)
{
If ($ExcludePreview -and $ExcludeOutofBand)
{
$AllAvailable = $VersionDataRaw | where {$_.outerHTML -match $CurrentWindowsVersion.'OS Build'.Split('.')[0] -and $_.outerHTML -notmatch "Preview" -and $_.outerHTML -notmatch "Out-of-band"}
}
ElseIf ($ExcludePreview)
{
$AllAvailable = $VersionDataRaw | where {$_.outerHTML -match $CurrentWindowsVersion.'OS Build'.Split('.')[0] -and $_.outerHTML -notmatch "Preview"}
}
ElseIf ($ExcludeOutofBand)
{
$AllAvailable = $VersionDataRaw | where {$_.outerHTML -match $CurrentWindowsVersion.'OS Build'.Split('.')[0] -and $_.outerHTML -notmatch "Out-of-band"}
}
Else
{
$AllAvailable = $VersionDataRaw | where {$_.outerHTML -match $CurrentWindowsVersion.'OS Build'.Split('.')[0]}
}
$UniqueList = (Convert-ParsedArray -Array $AllAvailable) | Sort OSBuild -Descending -Unique
$Table = New-Object System.Data.DataTable
[void]$Table.Columns.AddRange(@('Update','KB','InfoURL'))
foreach ($Update in $UniqueList)
{
[void]$Table.Rows.Add(
$Update.Update,
$Update.KB,
$Update.InfoURL
)
}
Return $Table
}
$CurrentPatch = $VersionDataRaw | where {$_.outerHTML -match $CurrentWindowsVersion.'OS Build'} | Select -First 1
If ($ExcludePreview -and $ExcludeOutofBand)
{
$LatestAvailablePatch = $VersionDataRaw | where {$_.outerHTML -match $CurrentWindowsVersion.'OS Build'.Split('.')[0] -and $_.outerHTML -notmatch "Out-of-band" -and $_.outerHTML -notmatch "Preview"} | Select -First 1
}
ElseIf ($ExcludePreview)
{
$LatestAvailablePatch = $VersionDataRaw | where {$_.outerHTML -match $CurrentWindowsVersion.'OS Build'.Split('.')[0] -and $_.outerHTML -notmatch "Preview"} | Select -First 1
}
ElseIf ($ExcludeOutofBand)
{
$LatestAvailablePatch = $VersionDataRaw | where {$_.outerHTML -match $CurrentWindowsVersion.'OS Build'.Split('.')[0] -and $_.outerHTML -notmatch "Out-of-band"} | Select -First 1
}
Else
{
$LatestAvailablePatch = $VersionDataRaw | where {$_.outerHTML -match $CurrentWindowsVersion.'OS Build'.Split('.')[0]} | Select -First 1
}
$Table = New-Object System.Data.DataTable
[void]$Table.Columns.AddRange(@('OSVersion','OSEdition','OSBuild','CurrentInstalledUpdate','CurrentInstalledUpdateKB','CurrentInstalledUpdateInfoURL','LatestAvailableUpdate','LastestAvailableUpdateKB','LastestAvailableUpdateInfoURL'))
[void]$Table.Rows.Add(
$CurrentWindowsVersion.Version,
$CurrentWindowsVersion.'Windows Edition',
$CurrentWindowsVersion.'OS Build',
$CurrentPatch.outerHTML.Split('>')[1].Replace('</a','').Replace('&#x2014;',' - '),
"KB" + $CurrentPatch.href.Split('/')[-1],
"https://support.microsoft.com" + $CurrentPatch.href,
$LatestAvailablePatch.outerHTML.Split('>')[1].Replace('</a','').Replace('&#x2014;',' - '),
"KB" + $LatestAvailablePatch.href.Split('/')[-1],
"https://support.microsoft.com" + $LatestAvailablePatch.href
)
Return $Table
@p0w3rsh3ll

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@p0w3rsh3ll p0w3rsh3ll commented Apr 25, 2021

Nice job Trevor 👍
May I add a suggestion to improve the code.
Instead of getting links from https://aka.ms/WindowsUpdateHistory, you could use the build you grabbed with the Get-MyWindowsVersion function.
Using that build, you could use a switch statement to set the URL to parse with Invoke-Webrequest :

20H2: https://support.microsoft.com/en-us/help/4581839
2004: https://support.microsoft.com/en-us/help/4555932
1909: https://support.microsoft.com/en-us/help/4529964
1903: https://support.microsoft.com/en-us/help/4498140
1809: https://support.microsoft.com/en-us/help/4464619
1803: https://support.microsoft.com/en-us/help/4099479
1709: https://support.microsoft.com/en-us/help/4043454
...

@SMSAgentSoftware

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@SMSAgentSoftware SMSAgentSoftware commented Apr 26, 2021

Thanks for the suggestion! I thought about something like that, but since all the information can be obtained from a single link it meant the code doesn't need to be updated for future releases.

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