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Fix: Windows 10 LTSB/LTSC Cumulative Update Installation

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Since Windows 10 is out of support and only allows ESU updates, LTSB/LTSC builds are impacted by this and are unable to be offline serviced.

This commit fixes that by installing the CU in the VM, staging the update in a LTSCUpdate folder in the Apps folder.
This commit is contained in:
rbalsleyMSFT
2026-02-13 17:25:26 -08:00
parent 6e6abfe833
commit 42b0b0c350
5 changed files with 250 additions and 20 deletions
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FFUDevelopment/FFUUI.Core/FFUUI.Core.psm1
+23 -1
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@@ -320,6 +320,23 @@ function Update-ApplicationPanelVisibility {
}
}
# Function to identify whether current Windows release selection is Windows 10 LTSB/LTSC
function Test-IsWindows10LtscReleaseSelection {
param([PSCustomObject]$State)
$releaseItem = $State.Controls.cmbWindowsRelease.SelectedItem
if ($null -eq $releaseItem) {
return $false
}
$releaseDisplay = [string]$releaseItem.Display
if ([string]::IsNullOrWhiteSpace($releaseDisplay)) {
return $false
}
return (($releaseDisplay -like 'Windows 10*') -and (($releaseDisplay -like '*LTSB*') -or ($releaseDisplay -like '*LTSC*')))
}
# Function to manage the state of the main "Install Apps" checkbox based on selections in Updates/Office
function Update-InstallAppsState {
param([PSCustomObject]$State)
@@ -327,11 +344,16 @@ function Update-InstallAppsState {
$installAppsChk = $State.Controls.chkInstallApps
$installOfficeChk = $State.Controls.chkInstallOffice
# Determine if Windows 10 LTSB/LTSC + Update Latest CU is selected
$isWindows10LtscRelease = Test-IsWindows10LtscReleaseSelection -State $State
$isLtscCuChecked = $State.Controls.chkUpdateLatestCU.IsChecked -and $isWindows10LtscRelease
# Determine if any checkbox that forces "Install Apps" is checked
$anyUpdateChecked = $State.Controls.chkUpdateLatestDefender.IsChecked -or `
$State.Controls.chkUpdateEdge.IsChecked -or `
$State.Controls.chkUpdateOneDrive.IsChecked -or `
$State.Controls.chkUpdateLatestMSRT.IsChecked
$State.Controls.chkUpdateLatestMSRT.IsChecked -or `
$isLtscCuChecked
$isForced = $anyUpdateChecked -or $installOfficeChk.IsChecked