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Update the windows wallpaper via an automation script and task


Darren Smith
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11 hours ago, Darren Smith said:

I have a wallpaper here: "https://e11onze-public.s3.eu-west-3.amazonaws.com/Assets/Wallpaper_3840x2160.png"

I want to standardise this across all my workstations

Please help

I'm guessing you don't have a domain setup in this environment? If you do, by all means, please utilize a GPO, it's much easier and is the recommended way for something like this.  Or even set a login script.  However, if these are not options for you, I've written the below you can use. I've tested it a little and it does the trick for all user accounts on a workstation (aside from Public, Administrator, Default). 

 

Please note, I don't know anything about your environment or how you envision this going. I assume you want to deploy it via Pulseway.  This will force log off any users that are currently logged in, in order to mount their registry hive and set the needed key. 

 

 
Function New-FileDownload {
    param(
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [string]$Url,
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [string]$Destination
    )
    $webClient = New-Object System.Net.WebClient
    $webClient.DownloadFile($Url$Destination)
    if (Test-Path -LiteralPath $Destination) {
        Write-Verbose "File downloaded Successfully"
        return $true
    }
    else {
        Write-Verbose "File download Failed"
        return $false
    }
}
 
$ImageURL = "https://e11onze-public.s3.eu-west-3.amazonaws.com/Assets/Wallpaper_3840x2160.png"
$Destination = "$($env:systemdrive)\Users\Public\Pictures\wallpaper.png"
$ImageDownload = New-FileDownload -Url $ImageURL -Destination $Destination
if ($ImageDownload) {
    Write-Output "Image downloaded. Continuing..."
}
else {
    Write-Output "Failed to download. Exiting."
    Exit 1
}
 
$Users = (Get-ChildItem "$($env:systemdrive)\users").Name
 
foreach ($User in $Users) {
    if ($User -eq $env:username) {
        Set-ItemProperty -Path "Registry::HKEY_CURRENT_USER\Control Panel\Desktop" -Name "Wallpaper" -value "$Destination"
    }
    if ($User -eq "Public" -or $User -eq "Administrator" -or $User -eq "Default") {
        Write-Output "Skipping $User"
    }
    else {
        $Sessions = Query Session
        $SessionID = $Sessions | Where-Object { $_ -match "$($User)" }
        if ($SessionID) {
            $ID = $SessionID.Split(' ', [System.StringSplitOptions]::RemoveEmptyEntries)
            LogOff $ID[2]
            Start-Sleep -Seconds 20
        }
        $LoadHive = REG LOAD HKU\temp "$($env:systemdrive)\Users\$user\ntuser.dat"
        if ($LoadHive -match "successfully") {
            Set-ItemProperty -Path "Registry::HKEY_USERS\Temp\Control Panel\Desktop" -Name "Wallpaper" -value "$Destination"
            Write-Output "Image set for $User."
            [GC]::Collect()
            [GC]::WaitForPendingFinalizers()
            $UnloadHive = REG UNLOAD HKU\temp
            if ($UnloadHive -match "successfully") {
                Write-Output "Hive unloaded successfully."
            } 
            else {
                Write-Output "Failed to unload hive. Exiting."
                Exit 1
            }
        }
        else {
            Write-Output "Failed to load Hive for $User"
        }
    }
}
 
RUNDLL32.EXE USER32.DLL, UpdatePerUserSystemParameters , 1 , True

 

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