In windows, when there are multiple windows on the screen, the window with a different title bar color is the window currently being operated. The window currently being operated is darker, and other windows are lighter. Computer icon and right-click the mouse.
#2. Select Open on the menu that pops up. 
3. Open one of the hard drives. 
4. Follow the above steps to open multiple folders. Select the previous folder and you will see the following. The colors are different. 
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