For the first time in Windows with the Windows 7 release, Microsoft is providing the ability to customize the logon screen background without hacking any system files. After you download and start the utility just click Change Logon Screen and then select your new background. The new background will be active as soon as you select the new background. Click Test to see it in action. Make sure that the background you select is smaller than 256KB, otherwise it will be rejected because of a size limitation set by Microsoft. If you want to remove your customized background just click Revert to Default Logon Screen and the registry changes will be removed.