WHY WE CANT CREATE A FOLDER NAMED CON

In Ms Dos several special  device files were available to aid in performing certain tasks, such as clearing the screen or deleting extraneous output from a program. In order to maintain backwards-compatibility , all versions of windows up to and including  windows 7 will refuse to allow you to create a file with these   “reserved device file names “ . The following names are reserved

     

  CON , PRN , AUX , NUL , COM1 , COM2 , COM3 , COM 4 , COM 5, COM6 , COM7 , COM8 , COM9 ,LPT1 , LPT2 , LPT3 , LPT4 , LPT5 , LPT6, LPT7 , LPT8, LPT9

HOW COMPUTER VIRUSES SPREAD ?

A Computer Virus is a computer program that can replicate itself and spread from one computer to another . In this Section we can find out how the computer viruses spread , the most common ways of  computer virus spreading are

·        Through Email Attachments , it’s the most common way of virus spreading

·        Through Computer Networks , such as peer to peer network , local area network , wan , wireless network  etc

·        Through virus infected websites

·        Through virus infected softwares and programs

·        Through Hackers , and through internet

·        Through mobile devices

·        Through  External devices such as USB drives , external hard disk , floppy drives etc

WHAT IS A VIRUS ?

A Computer Virus is a computer program that can replicate itself and spread from one computer to another . Otherwise we can say computer viruses are small software programs that are designed to spread from one computer to another and to interfere with computer operation. Depends on the nature of a computer virus it may cause damage to your computer system. In most cases if a file that contain virus  is executed or copied onto another computer ,then that computer will also be infected by the same virus. A virus program contains instructions to initiate some sort of event thet affect the infected computer system.  Or simply we can say  a computer virus is a piece of code that is loaded onto your computer without your knowledge and runs against your wishes. 

HOW TO INCREASE THE SPEED OF A COMPUTER SYSTEM

• Make Sure  That Your Computer Hardware is Sufficient
• Free Up Disk Space By Performing Disk Clean up
• Perform Disk Defragmentation To Increase Data Access Speed
• Remove Spyware And Help Protect Your Computer  From Viruses
• Uninstall Unwanted Softwares And Programs
• Adjust Visual Effects for Better Performance
• Install a Effective Anti-Virus Software And Scan For Viruses
• Disable Unnecessary Windows Services
• Clean Your Desktop
• Delete Cookies ,Cache And Internet History From Web Browsers

ESSENTIAL WINDOWS COMMANDS

Dear friends in this session we are going to learn some important commands that helps us to perform certain tasks . The following commands helps you to perform ceratin task very simply and easily . The very essential windows commands are

Add or Remove Programs         : Start à Run à  appwiz.cpl

Internet Explorer Settings         : Start à Run à  inetcpl.cpl

Windows Registry Editing         : Start à Run à  regedit.exe

Open Task Manager                 : Start à Run à  taskmgr.exe

To Show The Version Of Windows Currently Installed On The System

                                                    : Start à Run à  winver.exe

View Advanced Information About Hardware And Software Settings

                                                    : Start à Run à  msinfo32.exe

                                                    : Start à Run à  dxdiag

To View System Properties       : Start à Run à  sysdm.cpl