Windows Explorer is one of the most frequently used Windows tools by users. However, there are times when you need to open two screens, or navigate from one screen to another, in order to, for example, copy files between two folders, or between your hard drive and USB. Windows Double Explorer, a free tool available from Codeplex, makes such common tasks much easier.
From the Known Folders option, you can quickly open folders that normally would take a few clicks to navigate to, for example, AppData, Cache, Cookies, Favorites, to name a few. If you really miss Windows Explorer, you can launch it from within the tool.
Download the tool and try it yourself.