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 Second generation of Computers Third generation of Computers Fourth generation of Computers Fifth generation of Computers

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


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


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


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

Computer Virus

"The computer virus is a malicious code that replicates by copying itself to another program."  It can destroy a single program or the whole software of the computer system. In the 1970s, the first computer virus was generated, known as "Creeper virus." This virus can affect the computers on the ARPANET.

The viruses are unwanted software programs or piece of code which interfere with the functioning of computer software. They are spread via the contaminated files, data, and insecure networks. Once this type of insecure data, files, or network enters into the system then, it produces the duplicate copies of the virus and ruins the whole computer software.

Types of computer virus

There are several types of computer virus which are given below:

1. File Infector

The File Infector computer virus attaches itself with the executable programs such as word processor, spreadsheet applications and computer games. This virus overwrites the code or inserts infected code into the executable file. This virus also infects a number of operating systems such as Macintosh, Windows, and UNIX.

2. Macro Virus

The Macro virus is written in the macro language, which is used for software programs. This virus targets those applications and software which contain macros. The macro virus has carried out a series of operation which affects the performance of program or software.

3. Browser Hijacker

The Browser Hijacker is a malware program. It can modify the web browser settings without the user’s permission and redirect the user to the websites, but the user is not intended to visit.

4. Polymorphic Virus

The polymorphic virus is a harmful, destructive, or intrusive type of malware. It can change or make it difficult to detect with antimalware programs. The development of this malicious code can arise in a variety of ways such as filenames changes, compression, and encryption with variable keys.

5. Direct Action Virus

The Direct-Action Virus can load with the host program from computer memory. It attacks or starts work immediately and ruin the software. This virus is one of the two main types of file infector virus.

6. Boot Sector Virus

The Boot sector is a virus that can infect the boot sector of a floppy disk or the master boot record of the hard disk. It also affects at a BIOS level; they use DOS commands to spread the other floppy disks.

7. Multi Partite Virus

This virus is a fast-moving virus that uses file infectors or boot infectors to attack the boot sector executable files simultaneously. The multipartite virus infects and spreads in multiple ways. This virus has a dual personality,

8. Memory Resident Virus

The resident virus is the kind of computer virus which hides and stores itself within the computer memory. It can infect any file that runs or executed by the computer. The resident virus will load its replication module into memory, so it does not require to be executed to infect other files. This virus is activated whenever the operating system loads or operates a specific function.

9. Web Scripting Virus

The web scripting virus is a kind of computer security vulnerability through websites which breaks our web browser security. This virus allows the attackers to inject client-side scripting into the web page. It can steal our information from the web browser. This type of viruses is usually used to attack the sites with a larger population such as social networking, e-mail, etc.

10. FAT Virus

The FAT stands for File Allocation Table that is a system which is used for maintaining and accessing information of all files. The FAT is an index which can store the address of all records that are stored on the hard drive. This virus pollutes the file allocation table causing widespread damage.

11. Overwrite virus

The Overwrite virus is a malicious program which will effectively destroy the original program code after infection. It can spread itself by overwriting the data in the system’s memory. Several files lose their original content or data when this virus is activated because it can overwrite the content of the file. It infects the file, folders even programs.

12. Directory Virus

The directory virus changes the path that indicates the location of a file. When the user runs the programs and software that are affected by the directory virus. This virus program also runs in the background.