To close a window in Windows 10, you can _____.

• A. Right-click its button on the taskbar, then click Close window
• B. Click the Close button in the upper-right corner of the window
• C. Click the Close button in the window's thumbnail on the taskbar
• D. Click the Start button and click the program name or icon

Answer: (D)

Closing a window in Windows 10 can be done in several common ways, not just one path. The most direct method is to click the Close button (the X) in the upper-right corner of the window. This sends the window a close signal and should shut it down immediately.

Another reliable approach is to right-click the window’s taskbar button and choose Close window from the context menu. This performs the same action as clicking the X, but from the taskbar itself.

You can also close a window from its thumbnail previews on the taskbar: hover over the program’s taskbar icon to reveal the thumbnail, then click the X on that thumbnail to close that specific window. This is handy when multiple windows of the same program are open.

Keyboard shortcuts provide quick alternatives as well; pressing Alt+F4 closes the active window.

Using the Start button and selecting the program name or icon generally launches or restores the program, or switches focus to it, rather than closing an already open window. So that path won’t reliably close a window.