The common taskbar extension on the left side of the Win7 hot folder disappears. How to do

  
The fault map is as follows:

Resolve steps:
1. First click the folder menu bar that needs to be restored, then click on the top left corner. ; organization--layout"options;

2. In the pop-up submenu, click on the "Navigation pane" option;

3, then the menu bar will be found to be normal. And, in the layout there are search panes, preview panes, detailed panel information and other options, you can try to adjust, there will be different effects.

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