What is virus on computer ? A Computer Virus is a harmful program ( malicious software ) designed to damage, disrupt, or steal information from a computer system. It can spread from one device to another, corrupt files, slow down the system, and even cause complete system failure. . ๐ฆ Types of Computer Viruses 1. File Infector Virus Infects executable files (.exe) and spreads when the file is opened. 2. Boot Sector Virus Targets the boot sector of storage devices and can prevent the system from starting. 3. Macro Virus Infects documents like MS Word or Excel using macros . 4. Trojan Horse Looks like a normal program but performs harmful activities in the background. 5. Worms Spread through networks without attaching to any file; replicate automatically ⚠️ Symptoms of Computer Virus Infection If your compute...
What is operating system ? An Operating System (OS) is the main software that manages your computer or mobile device . It works like a bridge between the user and the hardware. ๐ Main Functions of an Operating System Manages Hardware (CPU, RAM, storage, etc.) Runs Applications (Browser, Games, MS Word, etc.) Controls File System (Saving/Deleting/Organizing files) Manages Memory Provides User Interface (Desktop, Icons, Menus) Handles Security (User login, permissions)