The Right Way to Close Windows Applications: Stop Draining Your PC's Performance

Overview

Most Windows users habitually click the X button in the top-right corner of an application window, assuming that action fully terminates the program. However, this common practice often leaves the application running in the background, silently consuming system resources such as CPU, memory, and disk I/O. Over time, these persistent background processes accumulate, slowing down your PC, draining battery life on laptops, and causing sluggish performance during everyday tasks. This guide explains why the X button is not always enough, provides clear, step-by-step instructions for completely closing applications using built-in Windows tools, and highlights frequent mistakes to avoid. By following these methods, you can reclaim system resources and keep your computer running smoothly.

The Right Way to Close Windows Applications: Stop Draining Your PC's Performance — Source: www.makeuseof.com

Prerequisites

A PC running Windows 10 or Windows 11 (instructions may vary slightly for earlier versions but remain largely similar).
Basic familiarity with the Windows desktop, Taskbar, and Start Menu.
Administrator access (optional, for making advanced changes like killing system processes or using PowerShell).
No additional software required; all tools are built into Windows.

Step-by-Step Instructions

Method 1: Using Task Manager to End Tasks Completely

Task Manager is the most reliable built-in tool for viewing and terminating running applications and background processes.

Press Ctrl + Shift + Esc to open Task Manager directly. Alternatively, press Ctrl + Alt + Delete and select Task Manager from the menu.
If Task Manager opens in compact mode, click More details at the bottom to expand the full view.
Go to the Processes tab. Under Apps, you will see currently open windows. Under Background processes, you will see programs running without a visible window.
Locate the application you want to close. For example, if you clicked X on a program like Microsoft Teams or Adobe Reader but it still shows under Background processes, right-click its entry and select End task.
Repeat for any other unwanted processes. Be careful not to end critical system processes (e.g., Windows Explorer, Antimalware Service Executable) unless you know what they do.

Why this works: The End task command sends a termination signal that the application cannot easily ignore (unlike the X button which is merely a request to close).

Method 2: Using the System Tray to Properly Exit Apps

Many applications, especially those that offer background services (like cloud sync, chat, or antivirus), minimize to the system tray (notification area) instead of closing entirely when you press X.

Look at the system tray on the right side of the taskbar. Click the up arrow (∧) to show hidden icons if needed.
Right-click the icon of the application you wish to close (e.g., OneDrive, Discord, Steam).
From the context menu, select Exit, Quit, Close, or similar wording. Avoid selecting Minimize or Hide.
If the application does not have an exit option in the tray, you may need to open its main window and look for a File > Exit or Settings > Quit menu item.

Note: Some programs (like antivirus) may require you to disable self-protection before allowing exit. In such cases, use Task Manager method with admin rights.

Method 3: Using Command Line or PowerShell for Advanced Users

For a more direct approach, you can terminate processes with the command line.

Open Command Prompt as administrator (search for cmd, right-click, select Run as administrator). Or open PowerShell as administrator.
To see all running processes with their names and IDs, type:
tasklist
Press Enter.
To kill a specific process by its name, type:
taskkill /IM "processname.exe" /F
For example: taskkill /IM "notepad.exe" /F
The /F flag forces termination.
Alternatively, kill by process ID (PID):
taskkill /PID 1234 /F
Replace 1234 with the actual PID from the tasklist output.
For PowerShell users, use:
Stop-Process -Name "processname" -Force
or Stop-Process -Id 1234 -Force

Caution: Forcefully terminating processes may cause data loss if the application has unsaved work. Always try graceful closures first.

Method 4: Configuring Application Startup Behavior to Prevent Background Running

Some applications are set to launch at startup and continue running even after you close their windows. Disabling startup can improve boot times and reduce background resource usage.

Open Task Manager (Ctrl + Shift + Esc).
Go to the Startup tab.
Select applications you do not need to start automatically (e.g., chat apps, updaters).
Click Disable. Repeat for other apps.
Reboot your PC to apply changes.

You can also adjust in-app settings: many programs have an option to "Run on system startup" that you can uncheck.

Common Mistakes

Confusing Minimize with Close: Clicking the X button is often incorrectly assumed to exit the program. As explained, many apps continue in the background. Always verify by checking Task Manager.
Using the X Button Too Quickly: Some applications display a confirmation dialog (e.g., "Do you want to save changes?") when you click X. Dismissing it without reading may cause unsaved data loss or leave processes hanging.
Terminating System Processes: Ending tasks like Windows Explorer or Runtime Broker can cause system instability, data loss, or require a restart. Only end processes you recognize and are sure are user-initiated.
Ignoring the System Tray: Users often overlook tray icons and assume the app is closed. Regularly check the tray for persistent icons and use their exit commands.
Overusing Force Kill: Repeatedly using taskkill /F on the same program without addressing its root cause (e.g., a buggy update or misconfiguration) can lead to corruption. Always try normal closure methods first.
Not Managing Startup Programs: Even if you close apps manually, many reload after a reboot. Disable unnecessary startup programs to reduce the number of background processes from the beginning.

Summary

Closing applications by clicking the X button is often insufficient because many programs continue running in the background, consuming system resources and slowing your PC. This guide provided several methods to fully terminate apps: using Task Manager, system tray exit options, command-line tools, and managing startup behavior. By employing these techniques and avoiding common pitfalls, you can significantly improve your computer's performance and responsiveness. Remember to always prefer graceful closure over force termination to prevent data loss.