How to open the Win7 taskbar window using Group Policy

1. First, press the win+R shortcut on the keyboard to open the running window of the computer. In the open running window, type gpedit.msc and click Enter. You can open the Group Policy Editor window of the win7 computer.
2. In the Group Policy Editor window that opens, click to expand “User Configuration”—“Administrative Templates”—“Start Menu and Taskbar" In the right window, find "Turn off the taskbar thumbnails" and double-click to open.
3. In the edit window of the Close Closed Taskbar Thumbnails dialog box, directly change the previous default settings to disabled, then click OK to save.
Whether it is an open folder or a program, just move the mouse to the icon of the taskbar window to see the preview window. From this preview window, you can easily get the current information of the process. Go to the preview window and you can use the above method to solve it.