The computer always automatically jumps out of the current window, that is, it is necessary to keep clicking on this window with the mouse. The problem is very serious. What should I do?

From the point of view of software technology, it should be another program in your machine that grabs the focus with this program window you opened, which is very common, qq. When many programs are running, if qq has a pop-up message, the focus will be taken away. Or maybe you're infected with a virus or a Trojan horse, and they messed up backstage. Some pop-up windows in web pages also have this property.

I can't see your machine, you have to rule it out one by one.