Recovery method after win7 system closes task thumbnail

1. Press “WIN+R” to open the run window, enter the “gpedit.msc” command and press Enter to open the local group policy editor;

2. In the group policy editor that opens, Expand “User Configuration”-“Administrative Templates -“Start Menu and Taskbar”Options;

3, then find and double-click on the side of the window to close the taskbar The thumbnail "rooks" option to open its properties window;

4, in the pop-up window, change "already enabled" to "ld unconfigured" or "disabled", then click “ Make sure the ” button exits the Group Policy Editor.