Windows/BackgroundWallpaper

• 2021 - Win10 - Wallpaper in registry, regedit

  Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Wallpapers

  • remove BackgroundHistoryPathX to get back windows wallpaper as option.

• Images in c:\Windows\Web\4K\Wallpaper\Windows\ , c:\Windows\Web\Wallpaper\Windows\img0.jpg

AWS Wallpaper

• 20 sec after loggin in a user's wallpaper gets updated with server information.

  1. Find user with

     Get-WMIObject -Query "select * from Win32_UserAccount where Name='<username>'"

  2. Reggedit Using the user key e.g.

     Computer\HKEY_USERS\<S-1-5-...62>\Software\Microsoft\Windows\CurrentVersion\Explorer\Wallpapers

  3. This should show the previous and current wall paper e.g.

     BackgroundHistoryPath0  C:\Users\<username>\AppData\Local\Ec2Wallpaper_Info.jpg
     BackgroundHistoryPath1  C:\Windows\web\wallpaper\Windows\img0.jpg

AWS Ec2LaunchSettings

• c:\ProgramData\Amazon\EC2-Windows\Launch\Module\Ec2Launch.psm1

  • this runs all the scripts under EC2-Windows\Launch\Scripts\*.ps1

• Start > run > Ec2LaunchSettings

  •  C:\ProgramData\Amazon\EC2-Windows\Launch\Scripts\InitializeInstance.ps1 

    •  Wait-Metadata 

    •  New-WallpaperSetup 

•  New-WallpaperSetup.ps1  - in -  c:\ProgramData\Amazon\EC2-Windows\Launch\Module\Scripts\ 

  • Create startup dirs for default and all users e.g. "C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup"

    • then create "initWallpaperSetupName" as startup script.

      #Powershell
      "Import-Module "C:\ProgramData\Amazon\EC2-Windows\Launch\Module\Ec2Launch.psd1"; Set-Wallpaper"
      # This run's all the ec2 scripts\*.ps1 modules, including "Set-Wallpaper.ps1"

• "Set-Wallpaper.ps1"

  • Impost-WallpaperUtil

  • Logs to "WallpaperSetup.log" -> C:\ProgramData\Amazon\EC2-Windows\Launch\Log\

Set for user

• https://stackoverflow.com/questions/43187787/change-wallpaper-powershell

   reg add "HKEY_CURRENT_USER\Control Panel\Desktop" /v Wallpaper /t REG_SZ /d h:\Quotefancy-1542-3840x2160.jpg /f
   Start-Sleep -s 10
   rundll32.exe user32.dll, UpdatePerUserSystemParameters, 0, $false

* https://superuser.com/questions/430508/how-to-change-desktop-background-of-a-specific-user-in-a-batch-file

#PowerShell:
$user = Get-WMIObject -Query "select * from Win32_UserAccount where Name='<username>'"
$path = 'Registry::HKEY_USERS\' + $user.SID + '\Control Panel\Desktop\'
Set-ItemProperty -path $path -name Wallpaper -value 'C:\path\to\wallpaper.jpg'
rundll32.exe user32.dll UpdatePerUserSystemParameters