If you tried to close the window or used shortcuts like Alt+F4 , the script would spawn six more windows that bounced erratically across your screen.
In its most basic form, a simple "End Task" from Task Manager could kill it. However, more evolved versions added persistence mechanisms, editing the Windows Registry to ensure the pop-ups return on every reboot. You Are An Idiot Virus Download Exe
Hold down the physical power button on your computer until it shuts off completely. If you tried to close the window or