UTILITY SOFTWARE
This is the software that enables user to manage files.
E.g. : Anti – virus , Disk cleanup , disk De fragmentation, system restore , task schedule , task manager.
FUNCTION
1) Display error message.
2) Detect malicious files
3) Delete all infected files
4) Protect computer from being harmed
5) Recovery damaged files of the system
OPERATING SYSTEM (OS)
What is an Operating System?
It has many definitions.
- A program that acts as an intermediary between a user of a computer and computer hardware.
- Is the part of the computing system that manages all the hardware and all of the software such as:-
- Allows for the usage of various applications
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- Surf the internet
- Play games
- Write software code
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- The Operating System is the recourse allocator
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- Allows the proper use to resources
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- The Operating System is a control program
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- Control the execution of programs to prevent errors
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- Is a program that manages all the other programs in a computer.
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Operating system performs basic tasks like input from the mouse or keyboard sending output to the video screen or printer. Keeping track of files on the drivers and controlling peripherals such as printers and modems.
NB: Your computer device, application software and utility programs cannot work, if it does not have an operating system (OS) because
– Operating system controls files you can save in a computer
– Operating system control different task that a computer can do at a time
– Operating system arrange the order of executing tasks in your computer
FUNCTIONS OF OPERATING SYSTEM
- Processor management
- Memory management
- Virtual storage
- Device management
- Information management
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Examples of operating system (OS) include:
– Disc operating system (DOS) – IBM OS/400
– Windows 98 – SOL ARLS
– Windows 2000 – UNIX
– Windows millennium – Windows XP, Vista <, 7 and 8
– Linux
– Mac (OS) X
– DEC VMS
USING OPERATING SYSTEM
INTRODUCTION TO WINDOWS BASICS
WINDOWS – Is a Graphical user Interface (GUI) kind of operating system like Ms – DOS, Macintosh, Linux, UNIX etc. Windows allows you to do more with your computer those other operating systems
A Windows – This is a bordered rectangular screen display, through which a user uses an opened programs to perform a task.
- Switching on a computer
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On starting a computer the figure shows you the first screen / windows. The screen is called Desktop. The desktop is composed of task bar on which the start button is located. The other items appearing on the desk top are called icons.
- Switching off a computer
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There are procedures that has to be followed when shutting down the computer
- Close all opened programs
- Click on the start menu on the task bar
- Click on shut down or turn off the computer
- From the dialog box that appears , select shut down or turn off the computer
- Then click OK (OKAY)
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- Window screen
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Desktop – This is a first screen of windows
Desktop- This is a strap appearing at the bottom of a window which consist of the following.
– The start menu bottom
– Current application buttons
– The quick launch toolbar
The start menu – This is used to access the list of programs found in the computer
Current application buttons – This contains the currently minimized application
Quick launch tool bar – This is used to quickly access the most common used application.
- Working with a window
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Minimizing – This puts the current window temporary in the taskbar located at the bottom of the desktop. You can return to where you left off by clicking the program’s name on the taskbar.
Maximizing – This makes the current window to fill the whole screen. The window cannot be resized and it gives you a maximum working areas.
Restoring – This is the size of a window before being maximized or minimized