If you don’t like the default logon background of windows 7,or you want to change the background to a picture you like,you can do it easily in windows 7 without any third-party softwares.Below will give you a simple guide about how to do it.
1.First launch regedit then go to HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background
2.Change the vaulue of OEMBackground to 1,which indicate to enale logon background customization in windows 7
Tip:If you can not find this entry in your registry,please try to create one.
3.Go to %windir%\system32\oobe\ ,create folder info then create another folder backgrounds under info,then copy your own background picture here and rename it to backgrounddefault
Note:The size of this picture must be less than 256k ,or it will not work.
4.Done,you can see your new logon background after logoff.It’s so easy,isn’t it!