Set a Lockscreen and Wallpaper Image based on Screen Resolution in Windows 10

References

Win32_DesktopMonitor class – Win32 apps | Microsoft Learn

Overview

This solution sets a lockscreen and wallpaper image according to the endpoints current screen resolution. If multiple monitors are connected with different resolutions, the image will be set based on the monitor with the highest resolution. The lockscreen image is set by modifying the appropriate registry value. The desktop wallpaper image is set using BGInfo, as my requirement is to have the wallpaper overlaid with information to assist our service desk, such as Operating System version and Host-name.

How to use

Download the source files from my Github repository:

https://github.com/Joshw97/Policy_LockscreenWallpaper.git

Create an MECM Package to copy the configuration files to the client. This includes the wallpaper images and BGInfo configurations. The package should run Copy_Configuration.ps1.
Create an MECM Configuration Baseline and set the below Discovery and Remediation scripts. The Discovery compliance logic is looking for an output of ‘True’. I set this Configuration Baseline to run every 30 minutes. More information on Configuration Baselines can be found here.

Configuration Baseline Discovery Script

	#Policy Lockscreen Wallpaper Discovery Script
	#Discovery Script for Configuration baseline
	#Contact \| Josh Woods
	#IMPORTANT \| Update version number below for each update for the Remediation and Discovery Script!!!

	#Variables
	$Version = "1.9"

	#Version Control
	#Test if the current version is present
	$TestReg = Get-ItemProperty 'HKLM:\Software\CustomPolicies' -Name Policy_LockscreenWallpaper \| Select-Object -ExpandProperty Policy_LockscreenWallpaper

	if ($TestReg -ne $Version){
	Write-Host "False"
	Exit
	}


	#Get Screen Resolution. The largest resolution is selected. If more than one of the largest resolution exists, both with be included.
	$ScreenHeight = Get-WmiObject -Class Win32_DesktopMonitor \| measure-object -Property ScreenHeight -maximum \| Select-Object -ExpandProperty Maximum
	$ScreenWidth = Get-WmiObject -Class Win32_DesktopMonitor \| measure-object -Property ScreenWidth -maximum \| Select-Object -ExpandProperty Maximum

	#Resolution List
	$ResolutionList = @(
	[pscustomobject]@{Name='1024×768';Width=1024;Height=768}
	[pscustomobject]@{Name='1280×720';Width=1280;Height=720}
	[pscustomobject]@{Name='1366×768';Width=1366;Height=768}
	[pscustomobject]@{Name='1440×900';Width=1440;Height=900}
	[pscustomobject]@{Name='1536×864';Width=1536;Height=864}
	[pscustomobject]@{Name='1600×900';Width=1600;Height=900}
	[pscustomobject]@{Name='1920×1080';Width=1920;Height=1080}
	[pscustomobject]@{Name='1920×1200';Width=1920;Height=1200}
	[pscustomobject]@{Name='2560×1440';Width=2560;Height=1440}
	[pscustomobject]@{Name='2560×1600';Width=2560;Height=1600}
	[pscustomobject]@{Name='2880×1920';Width=2880;Height=1920}
	[pscustomobject]@{Name='3440×1440';Width=3440;Height=1440}
	[pscustomobject]@{Name='3840×2160';Width=3840;Height=2160}
	)

	foreach ($Item in $ResolutionList) {
	#Set Wallpaper and Lockscreen based on Screen Resolution
	if (($ScreenHeight -eq $Item.Height) -and ($ScreenWidth -eq $Item.Width)) {

	$TestImage = "$env:programfiles\Policy_LockscreenWallpaper\Wallpaper\img0_$($Item.Width)x$($Item.Height).jpg"
	$Testpath = Get-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\Personalization' \| select-object -ExpandProperty LockscreenImage

	if ($Testpath -eq $TestImage) {
	Write-Host "True"
	Exit 0
	}
	else {
	#Do nothing
	}
	}

	}

view raw Discovery.ps1 hosted with ❤ by GitHub

Configuration Baseline Remediation Script

	#Policy Lockscreen Wallpaper Remediation Script
	#IMPORTANT \| Update version number below for each update for the Remediation and Discovery Script!!!
	#Contact \| Josh Woods

	#Variables
	$Version = "1.9"

	#Version Control
	#Test if the version Registry Item exists and create a new entry if it doesn't
	$TestReg = Get-ItemProperty 'HKLM:\Software\CustomPolicies' -Name Policy_LockscreenWallpaper \| Select-Object -ExpandProperty Policy_LockscreenWallpaper

	if ($TestReg -eq $Version){

	}
	Else {
	New-Item -Path 'HKLM:\Software' -Name 'CustomPolicies' -ErrorAction SilentlyContinue
	New-ItemProperty -Path 'HKLM:\Software\CustomPolicies' -Name Policy_LockscreenWallpaper -Value $Version -Force
	}

	#Get Screen Resolution. The largest resolution is selected. If more than one of the largest resolution exists, both with be included.
	$ScreenHeight = Get-WmiObject -Class Win32_DesktopMonitor \| measure-object -Property ScreenHeight -maximum \| Select-Object -ExpandProperty Maximum
	$ScreenWidth = Get-WmiObject -Class Win32_DesktopMonitor \| measure-object -Property ScreenWidth -maximum \| Select-Object -ExpandProperty Maximum

	#Copy BGInfo
	New-Item -Path "C:\Program Files" -Name "BGInfo" -ItemType "directory"
	New-Item -Path "C:\Program Files\BGInfo" -Name "BGInfoTheme" -ItemType "directory"
	New-Item -Path "C:\Program Files\BGInfo" -Name "Wallpaper" -ItemType "directory"
	Copy-Item -Path "$env:programfiles\Policy_LockscreenWallpaper\BGInfo\Bginfo64.exe" -Destination "C:\Program Files\BGInfo"

	#Adds a Registry Key for Personalization if it doesn't already exist.
	New-Item -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows" -Name "Personalization"

	#Resolution List
	$ResolutionList = @(
	[pscustomobject]@{Name='1024×768';Width=1024;Height=768}
	[pscustomobject]@{Name='1280×720';Width=1280;Height=720}
	[pscustomobject]@{Name='1366×768';Width=1366;Height=768}
	[pscustomobject]@{Name='1440×900';Width=1440;Height=900}
	[pscustomobject]@{Name='1536×864';Width=1536;Height=864}
	[pscustomobject]@{Name='1600×900';Width=1600;Height=900}
	[pscustomobject]@{Name='1920×1080';Width=1920;Height=1080}
	[pscustomobject]@{Name='1920×1200';Width=1920;Height=1200}
	[pscustomobject]@{Name='2560×1440';Width=2560;Height=1440}
	[pscustomobject]@{Name='2560×1600';Width=2560;Height=1600}
	[pscustomobject]@{Name='2880×1920';Width=2880;Height=1920}
	[pscustomobject]@{Name='3440×1440';Width=3440;Height=1440}
	[pscustomobject]@{Name='3840×2160';Width=3840;Height=2160}
	)

	foreach ($Item in $ResolutionList) {
	#Set Wallpaper and Lockscreen based on Screen Resolution
	if (($ScreenHeight -eq $Item.Height) -and ($ScreenWidth -eq $Item.Width)) {
	#Lockscreen
	New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\Personalization' -Name LockScreenImage -value "$env:programfiles\Policy_LockscreenWallpaper\Wallpaper\img0_$($Item.width)x$($Item.Height).jpg" -Force
	#BGInfo Wallpaper
	Remove-Item "C:\Program Files\BGInfo\Wallpaper\*" -Recurse -Force -ErrorAction SilentlyContinue
	Remove-Item "C:\Windows\System32\oobe\info\backgrounds\*" -Recurse -Force -ErrorAction SilentlyContinue
	Remove-Item "C:\Program Files\BGInfo\BGInfoTheme\*" -Recurse -Force -ErrorAction SilentlyContinue
	Copy-Item "$env:programfiles\Policy_LockscreenWallpaper\Wallpaper\img0_$($Item.width)x$($Item.Height).jpg" -Destination "C:\Program Files\BGInfo\Wallpaper"
	Copy-Item "$env:programfiles\Policy_LockscreenWallpaper\Wallpaper\img0_$($Item.width)x$($Item.Height).jpg" -Destination "C:\Windows\System32\oobe\info\backgrounds"
	Copy-Item "$env:programfiles\Policy_LockscreenWallpaper\Wallpaper\img0_$($Item.width)x$($Item.Height).jpg" -Destination "C:\Windows\System32\oobe\info\backgrounds"
	Copy-Item "$env:programfiles\Policy_LockscreenWallpaper\BGInfo\$($Item.width)x$($Item.Height)\Config.bgi" -Destination "C:\Program Files\BGInfo\BGInfoTheme"
	Rename-Item -Path "C:\Windows\System32\oobe\info\backgrounds\img0_$($Item.width)x$($Item.Height).jpg" -NewName "backgroundDefault.jpg"
	}
	else {
	#Lockscreen
	New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\Personalization' -Name LockScreenImage -value "$env:programfiles\Policy_LockscreenWallpaper\Wallpaper\img0_$($Item.width)x$($Item.Height).jpg" -Force
	#BGInfo Wallpaper
	Remove-Item "C:\Program Files\BGInfo\Wallpaper\*" -Recurse -Force -ErrorAction SilentlyContinue
	Remove-Item "C:\Windows\System32\oobe\info\backgrounds\*" -Recurse -Force -ErrorAction SilentlyContinue
	Remove-Item "C:\Program Files\BGInfo\BGInfoTheme\*" -Recurse -Force -ErrorAction SilentlyContinue
	Copy-Item "$env:programfiles\Policy_LockscreenWallpaper\Wallpaper\img0_$($Item.width)x$($Item.Height).jpg" -Destination "C:\Program Files\BGInfo\Wallpaper"
	Copy-Item "$env:programfiles\Policy_LockscreenWallpaper\Wallpaper\img0_$($Item.width)x$($Item.Height).jpg" -Destination "C:\Windows\System32\oobe\info\backgrounds"
	Copy-Item "$env:programfiles\Policy_LockscreenWallpaper\Wallpaper\img0_$($Item.width)x$($Item.Height).jpg" -Destination "C:\Windows\System32\oobe\info\backgrounds"
	Copy-Item "$env:programfiles\Policy_LockscreenWallpaper\BGInfo\$($Item.width)x$($Item.Height)\Config.bgi" -Destination "C:\Program Files\BGInfo\BGInfoTheme"
	Rename-Item -Path "C:\Windows\System32\oobe\info\backgrounds\img0_$($Item.width)x$($Item.Height).jpg" -NewName "backgroundDefault.jpg"
	}
	}

	#Run BGInfo at Logon
	New-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" -Name "BGInfo" -Value '"C:\Program Files\BGInfo\Bginfo64.exe" "C:\Program Files\BGInfo\BGInfoTheme\Config.bgi" /TIMER:0 /silent /NOLICPROMPT' -Force

	#Run BGInfo Now (Do not use. If deploying as a configuration baseline in MECM this will not work as the system account is used. The Scheduled Task below works around this by running as the logged on user.)
	#& "C:\Program Files\BGInfo\Bginfo64.exe" "C:\Program Files\BGInfo\BGInfoTheme\Config.bgi" /TIMER:0 /silent /NOLICPROMPT

	#Scheduled Task – Refreshes the BGInfo Desktop Image (When running the script under the local System account this will run the BGInfo update as the currently logged on user)
	$PS = New-ScheduledTaskAction -Execute "C:\Program Files\BGInfo\Bginfo64.exe" ` -Argument '"C:\Program Files\BGInfo\BGInfoTheme\Config.bgi" /TIMER:0 /silent /NOLICPROMPT"'
	$principal = New-ScheduledTaskPrincipal -UserId (Get-CimInstance -ClassName Win32_ComputerSystem \| Select-Object -expand UserName)
	$Settings = New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -hidden
	Register-ScheduledTask -TaskName "Wallpaper_BGInfo" -Action $PS -Principal $Principal -Settings $Settings \| Out-Null
	Start-ScheduledTask -TaskName "Wallpaper_BGInfo" \| Out-Null
	Start-Sleep -s 5
	Unregister-ScheduledTask -TaskName "Wallpaper_BGInfo" -Confirm:$false

view raw Remediation.ps1 hosted with ❤ by GitHub