Limitation Of Computer

Computer is very useful machine in our daily life.It helps to do our work faster and makes it easier.But it have certain limitation .They are:

• Computer can't do anything unless it is programmed for that work with specific instruction.
• If there any error in the syntax or information given by the programmer or designer then the output given by the computer is also incorrect which is always difficult to correct.
• Computer doesnot have its own intelligence.It has got Artificial intellience or it is only function by the guide of the user or programmer.
• Computer doesnot work untill the prsence of the electricity, sine it is an electrical device.
• Computer cannot care itself nor thinking itself.Though in programmed work done by computer is perfect and faster then a human can do .
• Computercannot take a quick decision itself because it doesnot have brain to think.
  

Diagnostic Software

Diagonistic software helps in the easy use of the computer software and saves the time . Diagonistic Software donot detect the problem in the software but gives the hints and valuable information about the computer system and its working.The Diagonistic also provide the basic information of the system.delete unnecessary files ,improve the computer's performance and repair window resistration.The main purpose of the diagonistic software is to diagonise the potential problem and to test drive.This software can be download from manufacture's website with no cost.Diagonistic software helpshould always be run when there is problem in the harddisk to check the status of the drive.

Computer Security

The computer is delicate electronic equipment. Computer should not be kept in a crowded place, smoky and dusty place. Computer is very sensitive to heat ,light, smoke , dust, fire because these components damage the its accessories. For the proper management of the computer the security is classified as follows: 1. Hardware Security 2. Software Security

1. Hardware Security: Protecting computer from physical damage, theft, etc fall in this category .For the proper management of the physical security of the computer system, we have to maintain following components: · Regular Maintenance · Insurance · Free Of Dust · Protection From Theft · Size of room · Ventilation and Light · Power Supply · Furniture · Computer

2. Software Security: Software security is the one of the important security measures. The program, software and data security s another important part before installing the computer. Software security requires : · Prevention of loss off data · Prevention of data and software program piracy · Prevention of corruption of data · Prevention from error reading of data
The measures of software security are: · Password Protection Prevents unauthorized access. · Virus free helps to keep the computer from virus infection. · Regular backup the data helps to restore the lost data. · Maintenance of hard disk using defragmentation of the files. This helps to manage and to store fragmented files. · Scanning the files using scandisk finds the files corrupted and repair them. · Using Firewall to prevent from virus infection.

Computer Virus

A virus is a small malicious computer program which has the ability to clone or replicate itself onto other computers and transfer quickly causing the predictable impedient in the normal functioning of the computer.The fulll form of the virus is Vital Information resources under seize.A virus is a destructive intellectual creation of highly talented computer criminals for the destructive of other computers.First the virus was created by John Von Neuman .HE gave the idea of replicating programs from media to media whereas Fred Cohan gave the name computer virus for the self replicating computer programs.First the virus was created by Alvi Brothes of Pakistan name C Brain.

The two important features of virus are:

• The feature of replication immediately onto the other computer.
• Transmission to the other computer without hte knowledge of user.
  

Types of computer virus on the basis of area they infected:

• Message Carrying Virus:Message carrying virus donot infect the computer rather displays the intresting message ,pictures ,to entertain you and to transfer your attention towards it.They are Mr Joshi virus.
  
• System Infectors:These virus destroys or corrupts the essential system fileshaving sys. or com. extension which helps in the operation of the computer.When one of these files run then these virus activate and create the damages in the program.Due to it the computer fails to perform normally and doesnot boot too .They are Aircop,Badhead virus etc.
  
• Start up infector:This virus damages the boot sector and information store in the IO sys. and MS-DOS .sys files.Due to htem data and aplicaton software would be altered cannot function normally.This virus affect the boot sector of the floppy and hard disk.Some of this virus are CBrain,Stone,8290 virus ,Marijuiana and so on.
  
• Application Infectors:These virus infect and damage the application software like Word Processing ,Spreadsheet Package ,data base PAckage atc and also destroys the program you created .The eg of these virus are Darkavenger ,The vienna virus and so on.