Computer Fundamentals Index

Computer Introduction Types of computer Characteristics of computer Uses of computer History of Computers

Computer Languages

Low Level language Middle level Language High level language

Computer Generation

Generation of Computers First Generation of Computer Second generation of Computers Third generation of Computers Fourth generation of Computers Fifth generation of Computers Sixth Generation of Computer

Peripheral Devices

Input devices Output device


Block diagram and basic components Control processing unit (CPU) Software Hardware


Computer Memory Registers Memory Hierarchy RAM Vs ROM Understanding file sizes (Bytes, KB, MB, GB, TB, PB, EB, ZB, YB)

Computer Network

Types of Network Types of Area Networks (LAN, WAN, MAN) TCP Flags

Computer Virus

Computer Virus

Computer Ports

Computer Ports


How to hack a computer How much do Computer Programmers make How does a Computer work How to associate a file with a program How does a computer convert text into binary How does a computer process data into information How to fix a CD-ROM DVD How to fix the no input signal How to install computer memory How to associate a file with a program How to log out of your operating system How do I change my name on Google How to installation or uninstallation Microsoft Paint How to fix a not a valid Win32 application error How to fix missing Microsoft Windows .dll files How to use a computer keyboard How to erase my hard drive and start over How can I test how many words I can write a minute How to shut down a computer How do I open and edit the Windows registry How to edit the registry from the command line How to restart Microsoft Windows How to install a computer processor How to open Microsoft Paint How to fix problems in Windows after installing new software How to enable or disable the preview pane of Microsoft Outlook How to open a Microsoft .wps or Works file in Word How to view the HTML source code in Microsoft Word How to View or Change the Screen Resolution of a Monitor How to Connect and Install a Computer Keyboard How to Delete Temporary Files in Windows 10 How to determine Which Version of Microsoft Office I'm using How to find out how much hard drive space is available How to Fix PC Stuck on Verifying DMI Pool Data How to choose which items show in the notification area How to find similar images using Search by Image How to fix Low Memory and out of memory errors How To Replace the CMOS Battery How do I Update my Antivirus Program How to fix a general protection fault How to Identify problems in the Windows Device Manager How can the Base be Shown How to test if a Website or Web Page is down How Much is 1 Byte, Kilobyte, Megabyte, Gigabyte, etc How to fix a CMOS checksum error How to Fix a Windows CD-ROM, DVD, or Disc Drive Issue How to Open Safe Mode How to Password Protect Files and Folders in Windows How to Reset CMOS or BIOS Settings How to use Computer Keyboard How to create a text file How to enable or disable DHCP in Windows How to test computer memory to determine if its bad How do double space or change line spacing in Microsoft Word How do I know if I have Windows Administrator Rights How many cores does my computer have How to Create a Directory or Folder How to Enter and Exit the BIOS or CMOS Setup How to change Windows Compatibility mode How to clear your internet browser history How to Connect Computer Speakers How to Copy a Web Page Link or URL How to install a Hard Drive or SSD How to Open the Windows Control Panel How to split a screen in Windows How to copy text from a scanned PDF


Who invented Computer What are the advantages of the Internet? What are the disadvantages of the Internet? Is my computer 64 bit? What is Edge Computing? What is a Router? What is Monitor What is Printer What is a Web Browser What is Microphone What is a Webcam What is PC What is Keyboard What is Motherboard What is WAP What is URL What is a Digital Assistant When was the first Computer Invented What is Modem What is Firmware What is Imperative Programming What is Protocol What is Safe Mode What is Device Driver What is Hybrid Topology What is Mesh Topology What is Procedural language What is a hyperlink What is a Username Who invented the Internet What is Video Card What is Sound Card What is Binary What does Alt+B do What does Alt+D do What does Alt+E do What does Alt+Esc do What does Alt+R do What does ALT + Q do What does Alt + Tab do What is Data Manipulation What is a touch screen What is Back Panel What is Analog Monitor What is AR lens What is an ATX Style Connector What is a File System What is Hard Disk Drive (HDD) What is a boot device What is accessibility What is Line In What is network Interface card (NIC) What is Optical Disk Where can I ask questions on the internet What is Auto Rotate What is CAD (Computer-aided design) What is Cable Modem What is Home Page What is boot menu What is braille reader What is flash memory What is Windows What is Clipboard What is Cyber Warfare What is Myspace Why has my IP address changed What is Jacquard Loom My computer is running slow, what steps can I do to fix it What is a Kensington Lock What is a multicore processor What is automation Are smartphones and tablets computers What is a Login Script What is a Loosely Typed Language What is Multitasking? Why my computer monitor shows no display or black screen What is REM What is Parallelization What is Overtype mode What is open with What is Bracket What is an Online Service What is REM What is Parallelization What is Overtype mode What is open with What is Bracket What is an Online Service What is the Pg Dn Key (Page Down Key) What is the Pg up Key (Page up Key) What is Palmtop Computer What is a Processing Device What is a Print Preview What is the Print Screen Key What can I do if my computer or laptop is lost or stolen What is a Model Number What are the currently available antivirus programs What are Toggle keys What is a Case fan What is a Silicon Chip What is a Slate PC What is a TAB stop What is an Octothorpe What is Task Pane What is Task View What is the svchost.exe file used for in Windows Where can I find free online virus scanners Why am I unable to increase the resolution in Windows What is Autofill When I click my mouse, it sometimes double-clicks What is Scratch What is UDIMM What is MsConfig What is an Expansion Card What is an Executable File What is an Elevated Command Prompt What is an AC Adapter What is AIMBOT What is a Software Suite What is a LED Monitor What does Alt + X do What does alt + space do What does Alt + O do Now that I’ve got a Computer, what can i do What is a Punch Card What is RDIMM What is Select All What is Serial number What is Thermos flask What programs can I use for speech recognition What are the Advantages of Computers What are the Disadvantages of Computers What does Alt + T do What Hardware Device Drivers should be Updated What is a Desktop What is a Ring Topology What is CMOS What is a Directory What is a Mechanical Mouse What is a Plotter What is a Variable What is an Icon What is Data What is HDMI What is Remote What is Right-Click What is SMPS Why does my Laptop not turn on What is a Copyright What is a Cordless Mouse What is a CSV file What is a Joystick What is a Start Button What is a Taskbar What is an Alignment What is an Output Device What is Cat 5 What is Google Chrome What is Post What are Recordable DVD Drives What Does Alt + F4 Do What Does Alt + L Do What is a bit (Binary Digit) What is a cable What is a Calculator What is a capacitor What is a Cold Boot What is a Dialog Box What is a Dual-boot What is a Slide What is A4 What is AM What is Barcode Reader What is EHCI What is a Header What is a Joystick What is a Secondary Storage Device What is Access Time What is Account Sharing What is an Asterisk What is Asynchronous DRAM What is Back Quote What is BIOS What is Borderless Printing What is Case Badge What is CD-ROM What is Chat Slang What is Composite What is RJ Cable What Are Bottom Row Keys What is SAN What is Tray What is VDU What Does Alt + M Do What Does Alt + P Do What is a Cell What is a Command Key What is a key Combination What is a Menu Bar What is a Startup What is a T What is Chat What are the F1 through F12 keys What does Alt + Enter do What Does Alt + Home DO What does Alt + R do What does Ctrl + B do What Does Ctrl + Enter Do What Does Ctrl + R Do What does Ctrl + G do What does Ctrl + 9 do What does Ctrl + End do What does Ctrl + O do What Does Ctrl + P do What Does Ctrl + Q do What is a Colon What is a Core What is Apple Touch Icon What is Clock What is Code What is Computer Crime What is Ctrl What is DAT What is Data diddling What is Date Why won't my computer turn on What Does Alt + N Do What does ctrl + 2 do What does ctrl + space do What does Ctrl + W do What does Ctrl + T Do What Does Ctrl + 2 do What does Ctrl + 5 Do What are the most common file types and file extensions What are Sticky keys What Does Ctrl + Shift + Esc Do What is Settings What is Task Manager What is Taskbar What is a DNS Resolver What does ctrl + 1 do What does ctrl + 0 do How to install software What is a Folder What is a Legend What is a MAC Address What is a Path What is a Ruler What is a Toolbar What is an Intranet Meaning and Differences with Internet What is an SSD What is Inheritance What is Tablet What is Depth What is Docking Station What is Double Click What is a Solid Ink Printer What is a Temporary File What is Backup and Restore What is Electronic Payment Systems Eps What is Marshalling


Difference between hardware and software Difference between multiprocessor and distributed systems Difference between Desktop and Laptop Difference between File and folder Difference between Hard Copy and Soft Copy Open Source Programs vs Closed Source Programs Difference between Optical Fibre and Coaxial Cable Difference between Website and Webpage Difference between Classes and Objects Input VS Output Difference between Primary and Secondary Storage with Examples


Quantum Computing Computer Software Autoexec.bat and config.sys info Update an Antivirus Use of Internet Advantages and disadvantages of Email Computing Power Internet Explorer Shortcut Keys Advanced Encryption Standard (AES) Augmented Reality Infrastructure Readiness Check Top 10 Internet tips and tricks Introduction and Features of FoxPro Features of Multimedia Top 10 online services and applications Receiving S.M.A.R.T. status bad backup and replacing error Version Control System Uninstalling Software or Apps in Windows Data Warehouse Increase or decrease font size in Word using keyboard shortcuts Mouse not detected or working in Windows Computer Cleaning Information and Steps Function Keys on Keyboard Windows 7 Alt+Tab won’t stay on top or stick 10 Essential Examples of Web Browsers Binary Subtraction using 2’s Complement Case Sensitive Languages Computer Pioneers and people who are CEO Microsoft Word Shortcut Keys Parts of Computers Names, Definitions and Images ROM and its Types Basics of Information Technology Characteristics of a Good Software Design Characteristics of Management Information System Classification of Management Information System Implementation of MIS Input Devices of Computer Definition Limitations of Management Information System 3 Types Of Network in Computer Block Diagram Of Control Unit Difference Between Computer and Embedded System Difference Between Hard Disk and Floppy Disk Abstraction in OOAD Hardware and Software Devices Optomechanical Mouse CMOS Memory What is a Terminal? What is Graphic Design? What is Load? What is Passcode? What is Reboot? What is Registry? What is Safe Mode? What is Standby? What is SYN (Synchronize)? What is Task Manager? Attribute Computing BPS in Computer Bulletin Board System Light Pen Input Device 3 TYPES OF NETWORK IN COMPUTER Block diagram of control unit What is a Solid Ink Printer? What is a Temporary File? What is an App launcher? What is Backup and Restore? What is a Tab Character? What is the Core i3? What is Paint? What is a Workbook? Advantages and Disadvantages of Online Education What is a String? What is a VDU (Visible Display Unit)? 50 Uses of Computer What is Workspace? What is a Procedural Language? What is VGA (Video Graphics Array)?

What Does Alt + F4 Do?

Alt+F4 is a keyboard shortcut frequently used to close active window or applications. When Alt+F4 is pressed, the operating system sends a signal to the active window or application to close. In most cases, pressing this shortcut will prompt the window or application to close immediately without further input from the user. However, some applications may prompt the user to save any unsaved work or confirm that the application should be completed before closing.

What Does Alt + F4 Do?

Alt+F4 is often used as a quick way to close a window or application that is not responding or is no longer needed. It is also commonly used to close multiple windows or applications simultaneously, as pressing Alt+F4 repeatedly will close each open window or application.

Alt+F4 can be used in various operating systems, including Windows, macOS, and Linux as well. In some operating systems, Alt+F4 may have distinct effects depending on the context in which it is used. For example, in Windows, Alt+F4 can be used to close the active window or application, but it can also be used to shut down or restart the computer if it is used from the desktop.

It is important to note that Alt+F4 is not a universal keyboard shortcut, and it may not work in all applications or operating systems. Some applications may have keyboard shortcuts for closing the application or may not respond to Alt+F4. Additionally, some operating systems may have different keyboard shortcuts for closing windows or applications or may not include Alt+F4 as a default shortcut.

Does Alt+F4 work on Windows?

The Alt+F4 keyboard shortcut is a quick and convenient way to close the currently active program using a Microsoft Windows operating system. By pressing & holding the Alt key and pressing the F4 key next, a command is sent to the computer to complete the program currently in focus. This is often used as a shortcut to close a program instead of navigating to the File menu and selecting the Exit or Close option.

It's important to note that when the Alt+F4 keyboard shortcut is used, the active program will close without allowing the user to save any unsaved changes. Therefore, it's important to keep up your work before using this shortcut.

When no programs are open, or you are on the desktop, pressing the Alt+F4 keyboard shortcut will open the Shutdown window. This window allows the user to choose from various options, such as shutting down the computer, restarting the computer, putting the computer to sleep, or signing out of the current user account.

Overall, the Alt+F4 keyboard shortcut is a useful tool for quickly closing programs, but it should be used with caution to avoid losing unsaved work.

What to do when Alt+F4 Doesn't Work?

If the Alt+F4 keyboard shortcut is not working, there are a few things you can try to troubleshoot the issue:

  • Check your keyboard: Ensure that your keyboard is properly connected to your computer and that all the keys are working properly.
  • Check for conflicting shortcuts: Some programs may have shortcuts that use the Alt+F4 combination. Try disabling these shortcuts or reassigning them to a different variety.
  • Check for software conflicts: Some programs or software may interfere with the Alt+F4 shortcut. Try disabling or uninstalling any newly installed programs to see if this resolves the issue.
  • Try using the Task Manager: Press the keys Ctrl+Shift+Esc, this will open the Task Manager, and you can select the program you want to close and click on the end task button.
  • Restart your computer: A simple restart can sometimes resolve keyboard shortcuts issues.
  • Check your settings: Go to settings > Ease of access > keyboard and check if the filter keys option is on and turn it off; this may be blocking the Alt+F4 shortcut.

If none of these solutions fixes the issue, there may be a deeper issue with your computer or the program you are trying to close. In this case, it may be essential to seek additional help from a technical support professional or try reinstalling the program.

There may be various reasons when Alt+F4 is not working:

  • The program you are trying to close is not the active window: Alt+F4 will only work if the program you want to complete is currently selected and in focus.
  • There is a conflict with another keyboard shortcut: If you have any custom keyboard shortcuts set up, they may prevent Alt+F4 from working.
  • The program is running in full-screen mode: If you try to close a program in full-screen mode, Alt+F4 may not work. In this case, you can press Alt+Tab to switch to a different program and then try Alt+F4.
  • There is an issue with the program itself: The program may have become unresponsive or encountered an error preventing it from closing.
  • There is a problem with your computer: If none of the above solutions fixes the problem, there may be an issue with your computer that is preventing Alt+F4 from working. This could be due to a hardware problem or a software issue.
  • If the Alt+F4 shortcut is not working, try using Task Manager to close the program or restart your computer. If these solutions don't work, you may need additional help from a technical support professional.

How to use the Alt+F4 shortcut?

To use this shortcut, follow these steps:

1. Locate the Alt key on your keyboard. This key is typically located on the left side of the keyboard, next to the spacebar.

2. Press and hold the Alt key.

3. While holding the Alt key, press the F4 key next.

4. Release both keys.

When you press the Alt+F4 keys together, the active window will close. This shortcut is commonly used to close programs, but it can also complete other types of windows, such as the Start menu or the Task Manager.

It's important to note that using the Alt+F4 keyboard shortcut will close the active window without giving you the option to save any unsaved changes you may have made. Be sure to keep your work before using this shortcut.

Difference Between Alt+F4 and Ctrl+F4:

Alt+F4 is a keyboard shortcut often used to close the currently active window or program on a computer. This shortcut works in most programs and operating systems, including Windows and macOS.

Ctrl+F4 is a keyboard shortcut used to close a tab or window within a program; it works slightly differently than Alt+F4. In some programs, Ctrl+F4 will close the current document or file within the program rather than closing the entire program. For example, if you use a word processor and have multiple copies open, Ctrl+F4 will close the active document, but the word processor itself will remain open.

Key differences between Alt+F4 and Ctrl+F4:

  • Alt+F4 closes the entire program or window, while Ctrl+F4 only closes the active document or file within a program.
  • Alt+F4 works in most programs and operating systems, while Ctrl+F4 may only work in certain programs.
  • Alt+F4 is usually the default keyboard shortcut for closing a window or program, while Ctrl+F4 may be program-specific.
  • Alt+F4 is a more widely used and universal keyboard shortcut for closing windows and programs, while Ctrl+F4 is more specific and may only work in certain programs. Hence it is essential to pay attention to the context in which you use these keyboard shortcuts.


Pressing the "Alt+F4" key combination on a Windows computer typically closes the active window. This can be beneficial when you want to complete a program or window that is not responding or that you no longer need. All in all, Alt+F4 can be a handy keyboard shortcut to have in your toolkit. Still, it's important to use it responsibly to avoid losing unsaved work or accidentally shutting down your computer.