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Update Update-BootWIM.ps1 #2

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51 changes: 30 additions & 21 deletions Update-BootWIM.ps1
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Original file line number Diff line number Diff line change
@@ -1,33 +1,42 @@
<#
Stripped down script from https://learn.microsoft.com/en-us/windows/deployment/update/media-dynamic-update
<#
Stripped down version of https://learn.microsoft.com/en-us/windows/deployment/update/media-dynamic-update
to update WinPE/boot image/boot.wim.
You need to download the approproiate CU for the boot image version you are using.
Copy the CU to $LCU_PATH. Copy your boot.wim file to $BOOT_WIM.

Version 0.1 - 2023-05-10
Version 0.2 - 2023-05-14
Sassan Fanai

#>

#Requires -RunAsAdministrator

param (
$UpdateFile = "C:\mediaRefresh\packages\LCU.msu",
$WimFile = "C:\Boot Image Backup\boot.wim",
$StagingPath = "C:\mediaRefresh\Temp"
)

function Get-TS { return "{0:HH:mm:ss}" -f [DateTime]::Now }

Write-Output "$(Get-TS): Starting media refresh"
if (!(Test-Path $UpdateFile)) {
Write-Output "$(Get-TS): No update file found @ [$UpdateFile]. Exiting..."
break
}

if (!(Test-Path $WimFile)) {
Write-Output "$(Get-TS): No WIM file found @ [$WimFile]. Exiting..."
break
}

Write-Output "$(Get-TS): Starting media refresh of [$WimFile]"

# Declare Dynamic Update packages
$LCU_PATH = "C:\mediaRefresh\packages\LCU.msu"
$BOOT_WIM = "C:\Boot Image Backup\boot.wim"
$LCU_PATH = $UpdateFile
$BOOT_WIM = $WimFile

# Declare folders for mounted images and temp files
$WORKING_PATH = "C:\mediaRefresh\temp"
$WINPE_MOUNT = "C:\mediaRefresh\temp\WinPEMount"
$WORKING_PATH = "$StagingPath"
$WINPE_MOUNT = "$StagingPath\WinPEMount"

# Check for LCU MSU
if (!(Test-Path $LCU_PATH)) {
Write-Output "$(Get-TS): No LCU.msu found. You nned to download and copy the CU for your boot image version to $LCU_PATH and rename the file to LCU.msu"
break
}

# Create folders for mounting images and storing temporary files
if (!(Test-Path $WORKING_PATH)) {
Expand All @@ -47,12 +56,12 @@ $WINPE_IMAGES = Get-WindowsImage -ImagePath $BOOT_WIM
Foreach ($IMAGE in $WINPE_IMAGES) {

# update WinPE
Write-Output "$(Get-TS): Mounting WinPE, image index $($IMAGE.ImageIndex)"
Write-Output "$(Get-TS): Mounting WinPE, image index [$($IMAGE.ImageIndex)]"
Mount-WindowsImage -ImagePath $BOOT_WIM -Index $IMAGE.ImageIndex -Path $WINPE_MOUNT -ErrorAction stop | Out-Null

try
{
Write-Output "$(Get-TS): Adding package $LCU_PATH"
Write-Output "$(Get-TS): Adding package [$LCU_PATH]"
Add-WindowsPackage -Path $WINPE_MOUNT -PackagePath $LCU_PATH | Out-Null
}
Catch
Expand All @@ -76,9 +85,9 @@ Foreach ($IMAGE in $WINPE_IMAGES) {
Dismount-WindowsImage -Path $WINPE_MOUNT -Save -ErrorAction stop | Out-Null

#Export WinPE
Write-Output "$(Get-TS): Exporting image to $WORKING_PATH\boot2.wim"
Export-WindowsImage -SourceImagePath $BOOT_WIM -SourceIndex $IMAGE.ImageIndex -DestinationImagePath $WORKING_PATH"\boot2.wim" -ErrorAction stop | Out-Null

Write-Output "$(Get-TS): Exporting image to [$WORKING_PATH\boot2.wim]"
Export-WindowsImage -SourceImagePath $BOOT_WIM -SourceIndex $IMAGE.ImageIndex -DestinationImagePath $WORKING_PATH"\boot2.wim" -ErrorAction stop | Out-Null
}

Move-Item -Path $WORKING_PATH"\boot2.wim" -Destination $BOOT_WIM -Force -ErrorAction stop | Out-Null
Write-Output "$(Get-TS): Moving updated and exported boot2.wim from staging area [$StagingPath] to [$BOOT_WIM]"
Move-Item -Path $WORKING_PATH"\boot2.wim" -Destination $BOOT_WIM -Force -ErrorAction stop | Out-Null