As we all know, the task bar icon disappears in the lower right corner of the desktop. After many windows applications are started, an icon is displayed in the lower right corner of the task bar. Sometimes the application icon disappears inexplicably, this will make some applications unavailable. For example, if you open a QQ, the main panel is hidden. At this time, you can click the QQ icon on the taskbar to bring up the main panel of QQ. If the icon on the taskbar disappears, the new message is not displayed. If you are not familiar with the QQ shortcut key, you cannot open it when you want to view the main panel. The problem solved by www.2cto.com is simple: we can open the task manager and kill the windows desktop process "explorer ", then run the command again (win + R combination key or "file --> Run" in the task manager. But at the same time, it will also produce some irrelevant side effects, such as the previous opened file browsing windows will close.