To open each folder in its own window
Open Folder Options in Control Panel.
Click Start, and then click Control Panel.
Click Appearance and Themes, and then click Folder Options.
On the General tab, under Browse Folders, click Open each folder in its own window.
If you select this option, every folder will open in a new window.
By default, each folder you open appears in the same window and overwrites the previous window contents. To return to this setting, click Open each folder in the same window.
Folder Options overview
Open a file or folder
Open each folder in a separate part of memory