What should I do if the quick launch bar of the win7 computer disappears?

We know that in the win7 32-bit system, on the left side of the taskbar at the bottom of the screen, next to the win button, there will be a quick launch bar, which includes a lot of program software, we are free to use what we often use. Software tools are added to it so that the next time we need to start it, we can open it directly inside, avoiding the need to enter the library to open the query. This is a very user-friendly design in the windows system, which makes our operation more convenient and faster. Recently, some friends have found that their computer suddenly can't see the menu bar. How to solve this problem?
1. First, let's move the mouse to the taskbar at the bottom of the screen, right click, and select the tool. Bar - New toolbar, in the window that opens, enter the path %UserProfile%\\AppData\\Roaming\\Microsoft\\Internet Explorer\\Quick Launch, then click on the Select folder below.
2. After completing the above settings, the quick launch bar that disappears should be displayed in the task bar below. You can go back and check it out.