Change Background Image for Logon Screen.

Step-1    Press Windows key + R (open Run Box).

Step-2    Type Regedit.

step-3     Click 0k.

Step-4    Click Yes.

Step-5    Dual Click HKEY_LOCAL_MACHINE.

Step-6    Dual Click SOFTWARE.

Step-7    Dual Click Microsoft.

Step-8    Dual Click Windows.

Step-9    Dual Click CurrentVersion.

Step-10  Dual Click Authentication.

Step-11  Dual Click LogonUI.

Step-12  Click Background.

Step-13   Dual Click OEMBackground.

Step-14    Type 1 (Value Data).

Step-15    Open My Computer.

Step-16    Open Disk (C:).

Step-17    Open Windows Folder.

Step-18    Open System32 Folder.

Step-19    Open oobe Folder.

Step-20    Open Info Folder.

Step-21    Create New Folder (Folder Name backgrounds).

Step-22    Paste Image (Image Name backgrounddefault).

     Note : Image size 256KB.

                                             Show Lock Screen