diff --git a/flash/scripts/07-desktop-info.ps1 b/flash/scripts/07-desktop-info.ps1
index 7c379aa..84f2e7f 100644
--- a/flash/scripts/07-desktop-info.ps1
+++ b/flash/scripts/07-desktop-info.ps1
@@ -31,6 +31,12 @@ $renderContent = @'
 # Runs on every user logon via Scheduled Task.
 
 $ErrorActionPreference = "Continue"
+$LogFile = "C:\Windows\Setup\Scripts\desktopinfo.log"
+function Write-Log {
+    param([string]$Message, [string]$Level = "INFO")
+    Add-Content -Path $LogFile -Value "[$(Get-Date -Format 'HH:mm:ss')] [$Level] $Message" -Encoding UTF8
+}
+Write-Log "DesktopInfo render started" -Level INFO
 
 Add-Type -AssemblyName System.Drawing
 Add-Type -AssemblyName System.Windows.Forms
@@ -46,6 +52,7 @@ public class WallpaperApi {
 # -----------------------------------------------------------------------
 # Collect system info
 # -----------------------------------------------------------------------
+Write-Log "Collecting system info"
 $hostname   = $env:COMPUTERNAME
 $userDomain = $env:USERDOMAIN
 $userName   = $env:USERNAME
@@ -69,12 +76,15 @@ $domain = if ($csInfo -and $csInfo.PartOfDomain) { $csInfo.Domain } `
           elseif ($csInfo -and $csInfo.Workgroup) { $csInfo.Workgroup.ToLower() } `
           else { "N/A" }
 
+Write-Log "hostname=$hostname user=$loggedUser os=$osName ram=$($ramGB)GB cpu=${cpuCount}x${cpuSpeed}MHz ips=$ips domain=$domain"
+
 # -----------------------------------------------------------------------
 # Screen dimensions
 # -----------------------------------------------------------------------
 $screen = [System.Windows.Forms.Screen]::PrimaryScreen
 $width  = if ($screen) { $screen.Bounds.Width  } else { 1920 }
 $height = if ($screen) { $screen.Bounds.Height } else { 1080 }
+Write-Log "screen=${width}x${height}"
 
 # -----------------------------------------------------------------------
 # Create bitmap and graphics context
@@ -134,11 +144,22 @@ $g.Dispose()
 # Save and set as wallpaper
 # -----------------------------------------------------------------------
 $bmpPath = "C:\Windows\Setup\Scripts\desktopinfo.bmp"
+Write-Log "Saving BMP: $bmpPath"
 $bmp.Save($bmpPath, [System.Drawing.Imaging.ImageFormat]::Bmp)
 $bmp.Dispose()
 
+# Clear Windows wallpaper cache so it reloads from our BMP
+# Without this, Windows reuses TranscodedWallpaper and ignores the updated file
+$transcodedPath = "$env:APPDATA\Microsoft\Windows\Themes\TranscodedWallpaper"
+if (Test-Path $transcodedPath) {
+    Remove-Item $transcodedPath -Force -ErrorAction SilentlyContinue
+    Write-Log "Cleared TranscodedWallpaper cache"
+}
+
 # SPI_SETDESKTOPWALLPAPER=20, SPIF_UPDATEINIFILE|SPIF_SENDCHANGE=3
-[WallpaperApi]::SystemParametersInfo(20, 0, $bmpPath, 3) | Out-Null
+$result = [WallpaperApi]::SystemParametersInfo(20, 0, $bmpPath, 3)
+Write-Log "SystemParametersInfo result: $result"
+Write-Log "DesktopInfo render complete" -Level INFO
 '@
 
 $renderContent | Set-Content -Path $RenderScript -Encoding UTF8 -Force
diff --git a/scripts/07-desktop-info.ps1 b/scripts/07-desktop-info.ps1
index 7c379aa..84f2e7f 100644
--- a/scripts/07-desktop-info.ps1
+++ b/scripts/07-desktop-info.ps1
@@ -31,6 +31,12 @@ $renderContent = @'
 # Runs on every user logon via Scheduled Task.
 
 $ErrorActionPreference = "Continue"
+$LogFile = "C:\Windows\Setup\Scripts\desktopinfo.log"
+function Write-Log {
+    param([string]$Message, [string]$Level = "INFO")
+    Add-Content -Path $LogFile -Value "[$(Get-Date -Format 'HH:mm:ss')] [$Level] $Message" -Encoding UTF8
+}
+Write-Log "DesktopInfo render started" -Level INFO
 
 Add-Type -AssemblyName System.Drawing
 Add-Type -AssemblyName System.Windows.Forms
@@ -46,6 +52,7 @@ public class WallpaperApi {
 # -----------------------------------------------------------------------
 # Collect system info
 # -----------------------------------------------------------------------
+Write-Log "Collecting system info"
 $hostname   = $env:COMPUTERNAME
 $userDomain = $env:USERDOMAIN
 $userName   = $env:USERNAME
@@ -69,12 +76,15 @@ $domain = if ($csInfo -and $csInfo.PartOfDomain) { $csInfo.Domain } `
           elseif ($csInfo -and $csInfo.Workgroup) { $csInfo.Workgroup.ToLower() } `
           else { "N/A" }
 
+Write-Log "hostname=$hostname user=$loggedUser os=$osName ram=$($ramGB)GB cpu=${cpuCount}x${cpuSpeed}MHz ips=$ips domain=$domain"
+
 # -----------------------------------------------------------------------
 # Screen dimensions
 # -----------------------------------------------------------------------
 $screen = [System.Windows.Forms.Screen]::PrimaryScreen
 $width  = if ($screen) { $screen.Bounds.Width  } else { 1920 }
 $height = if ($screen) { $screen.Bounds.Height } else { 1080 }
+Write-Log "screen=${width}x${height}"
 
 # -----------------------------------------------------------------------
 # Create bitmap and graphics context
@@ -134,11 +144,22 @@ $g.Dispose()
 # Save and set as wallpaper
 # -----------------------------------------------------------------------
 $bmpPath = "C:\Windows\Setup\Scripts\desktopinfo.bmp"
+Write-Log "Saving BMP: $bmpPath"
 $bmp.Save($bmpPath, [System.Drawing.Imaging.ImageFormat]::Bmp)
 $bmp.Dispose()
 
+# Clear Windows wallpaper cache so it reloads from our BMP
+# Without this, Windows reuses TranscodedWallpaper and ignores the updated file
+$transcodedPath = "$env:APPDATA\Microsoft\Windows\Themes\TranscodedWallpaper"
+if (Test-Path $transcodedPath) {
+    Remove-Item $transcodedPath -Force -ErrorAction SilentlyContinue
+    Write-Log "Cleared TranscodedWallpaper cache"
+}
+
 # SPI_SETDESKTOPWALLPAPER=20, SPIF_UPDATEINIFILE|SPIF_SENDCHANGE=3
-[WallpaperApi]::SystemParametersInfo(20, 0, $bmpPath, 3) | Out-Null
+$result = [WallpaperApi]::SystemParametersInfo(20, 0, $bmpPath, 3)
+Write-Log "SystemParametersInfo result: $result"
+Write-Log "DesktopInfo render complete" -Level INFO
 '@
 
 $renderContent | Set-Content -Path $RenderScript -Encoding UTF8 -Force