Numerous free tools are available to change the Windows 7 logon background and good thing is most of these utilities are available for free of cost. If you are new to Windows 7 operating system and looking for a way to change Windows 7 logon screen background, here is free tool to customize logon background, text, and button in a jiffy.
7LogonChanger is easy-to-use, requires no installation, and offers Windows shell integration. You can add 7LogonChanger to context menu to quickly access the tool. Logon message (use this feature to display a custom message just before the logon screen) can also be shown using this tiny tool.
Text button style, logon message, and other options can be found under settings. You can revert to the default logon background by hitting Restore Default button.
Please note that you need to run this tool with administrator rights. To do this, right-click on the tool and select run as administrator option.