This will launch the Windows 7 Task Manager as shown below. You now want to select the process, or program, you wish to terminate by left-clicking on it once so it becomes highlighted as shown in ...

You might see an entry called simply Program, with a blank icon and no publisher in the Windows Task Manager. This post provides explanation on what it is.

Learn how to force close a program, even when the program won't close with Task Manager in Windows 11/10 with taskkill.exe, shortcut, free tool or End tree command.