1.
First create a folder
named Wallpaper in your DC and make it a shared folder and give read access
to Domain Computers group.
2.
Copy the background
image which you have modified to the above folder and rename it to backgroundDefault.jpg (images must be less than 245 KB in size).
3.
Logon to the DC as
domain administrator and take administrative tool -> Group policy management
-> expand Group policy objects.
4.
Right click and edit a
Computer policy that is applied to the machines that you want to make this
change on.
5.
From above mentioned
computer policy, go to Computer Configuration > Preferences > Windows
settings -> right click Folders select New
folder, then type %WindowsDir%\System32\oobe\info\backgrounds in the Path text
and on Action select Create. Click ok.
6.
Now Right click Files and
select New File and type the following:
a. In the Source file:
\\yourDC\Wallpaper\backgroundDefault.jpg
b. In the Destination File:
%WindowsDir%\System32\oobe\info\backgrounds\backgroundDefault.jpg
7.
After the above step
right click the Registry and select New registry Item
and type the following entry in the fields.
Key Path:
Software\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background
Value Name: OEMBackground
Value type: REG_DWORD
Value Data: 1
8.
Click ok and close the
group policy editor.
9.
Take the command prompt
and type gpupdate /force.
10.
Reboot all the stations.
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