HOWTO: Permanently replace the ugly Windows 10/2016 login screen background and colors for all users with #PowerShell

I can’t stand the default Windows 10 and Windows Server 2016 logon background, and one of the first things I do when I build a new Windows template at a customer site is wipe that default background out!  I typically replace it with a single solid color, and I’m kind of fond of the old blue backgrounds that came with Windows XP (or was it Windows NT 4 – or may Windows 2000, I don’t remember now) as they are easy on the eyes… Anyways – the background color I like and use has a RGB value of 58 110 165.

I used to have a basic batch file to wipe it Microsoft’s stock background out by copying an existing background over from my staging server, but with every iteration of Windows 10 and Windows Server 2016, the path to img100.jpg in C:\Windows\WinSxS changes.  So last night I decided it was time to use some PowerShell to take care of this menace and allow the script to run on multiple platforms and software updates.

I struggled with creating a new solid color background jpg in PowerShell using the RGB value I wanted, but eventually I found some code that someone had posted elsewhere on how to create a gradient jpg, so I snagged it and set the gradient to be same at the end as the beginning, which results in a solid color all the way across.  I’m sure someone with better skills than me could clean this up properly – but this suits my purposes for what I need so I stopped searching for a better way.

So basically what this script does is create a new jpg that is 640×480 in C:\Windows\Web\Wallpaper\Staging, adjusts the accent colors for the current user and the default user profile, finds the path to img100.jpg and replaces it after taking ownership and setting appropriate ntfs rights to it, then clears out the lock screen jpgs using RoboCopy.  The lock screen jpgs are owned by the System account, and Robocopy /mir /zb is the simplest way to wipe them out that I know of without using Sysinternals Suite psexec to involve System account privileges and delete the jpgs.

You definitely need to run this in an elevated PowerShell session too!

As always – Use any tips, tricks, or scripts I post at your own risk.

New-Item -Path "C:\Windows\Web\Wallpaper\Staging" -ItemType "Directory" -Force -Confirm:$false | out-null
Add-Type -AssemblyName System.Drawing
$newbackground = New-Object System.Drawing.Bitmap 640, 480
(New-Object System.Drawing.Drawing2D.LinearGradientBrush(
(New-Object System.Drawing.Point(0, 0)),
(New-Object System.Drawing.Point(640, 480)),
[System.Drawing.Color]::FromArgb(58, 110, 165),
[System.Drawing.Color]::FromArgb(58, 110, 165))),
0, 0, $newbackground.Width, $newbackground.Height)
copy-item -path C:\Windows\Web\Wallpaper\Staging\background.jpg -destination c:\windows\web\wallpaper\background.jpg -force -confirm:$false
REG ADD "HKEY_USERS\ZZZ\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Accent" /f /v "StartColor" /t REG_DWORD /d 0xffa66c39
REG ADD "HKEY_USERS\ZZZ\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Accent" /f /v "AccentColor" /t REG_DWORD /d 0xffb51746
REG ADD "HKEY_USERS\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Accent" /f /v "StartColor" /t REG_DWORD /d 0xffa66c39
REG ADD "HKEY_USERS\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Accent" /f /v "AccentColor" /t REG_DWORD /d 0xffb51746
REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Accent" /f /v "StartColor" /t REG_DWORD /d 0xffa66c39
REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Accent" /f /v "AccentColor" /t REG_DWORD /d 0xffb51746
REG ADD "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Accent" /f /v "DefaultStartColor" /t REG_DWORD /d 0xffa66c39
takeown /f C:\ProgramData\Microsoft\Windows\SystemData /a /r /d y
takeown /f C:\Windows\Web\Screen\img100.jpg /a
icacls C:\Windows\Web\Screen\img100.jpg /grant Administrators:F
$lockscreen = "C:\ProgramData\Microsoft\Windows\SystemData\S-1-5-18\ReadOnly\LockScreen_Z"
$tempfolder = "C:\ProgramData\Microsoft\Windows\SystemData\S-1-5-18\ReadOnly\LockScreen_Temp"
$img100 = Get-ChildItem C:\Windows\WinSxS -Recurse -Include img100.jpg
write-host $img100
takeown /f $img100 /a
icacls $img100 /grant Administrators:F /q
copy-item -path c:\windows\web\wallpaper\background.jpg -destination $img100 -force -confirm:$false | out-null
copy-item -path c:\windows\web\wallpaper\background.jpg -destination C:\Windows\Web\Wallpaper\Windows\BlueBackground.jpg -force -confirm:$false | out-null
copy-item -path c:\windows\web\wallpaper\background.jpg -destination C:\Windows\Web\Screen\img100.jpg -force -confirm:$false | out-null
New-Item -Path $tempfolder -ItemType "Directory" | out-null
Robocopy $tempfolder $lockscreen /zb /mir /njh /njs
Remove-Item -Path $tempfolder -force -confirm:$false | out-null


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