In Windows 7, when you open multiple excel files, by default it will open in same windows. Its for faster performance and speed by reducing the memory usage and using single excel.exe process.
Sometimes we need to open diffrent excel files in seperate windows to switch easily or compare the sheets. Microsoft released a fix tool for doing it by changing the registry values. The tool automaticaly backup the current registry settings and save in your desktop.
Open excel files in seperate windows
Download the file and run.