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Operating System

OPERATING SYSTEM

An operating system (OS), in its most general sense, is software that allows user to run other applications on a computing device.
a software program that enables the computer hardware to communicate and operate with the computer software.
Without a computer operating system, a computer and software programs would be useless.


Windows
·  is a collection of programs known as an operating system (OS) that controls a PC (personal computer).
Windows' key benefits and features
· Allows the user to interact with the computer (through the keyboard, mouse, microphone, etc.).
· Controls the storage of data (images, files, music).
· Controls hardware attached to the computer such as webcams, scanners and printers.
· Helps to open and close programs (word processors, games, photo editors, etc.), and gives them part of the computers memory to allow them to work.
· Controls what access to a computer different users have and the computer's security.
· Deals with errors and user instructions, and issues simple error messages.
· Promotes multitasking by allowing the user to do several things on the computer at once – for example, watch a video while writing a letter
Bios Setup
· BIOS, which stands for Basic Input Output System, is software stored on a small memory chip on the motherboard. 
· You might need to access BIOS to change how the device works or to assist in troubleshooting a problem.
· It's BIOS that's responsible for the POST and therefore makes it the very first software to run when a computer is started.
· BIOS instructs the computer on how to perform a number of basic functions such as booting and keyboard control.
· BIOS is also used to identify and configure the hardware in a computer such as the hard drivefloppy driveoptical driveCPUmemory, etc.
Start up Menu
       

· is the primary location in Windows to locate your installed programs and find any files or folders. 
· By default, the Start Menu is accessed by clicking the Start button, located in the bottom left-hand corner of the Windows Desktop screen.
·  this menu is filled with less important programs, while most of the time the newly installed and important programs are hidden behind the sub menu All Programs.

Install windows
1) Enter your computer's BIOS.
 Turn off the computer that you want to install Windows on then turn it back on. When the BIOS screen appears or you are prompted to do so, press DelEscF2F10, or F9 (depending on your computer’s motherboard) to enter the system BIOS. The key to enter the BIOS is usually shown on the screen.
2) Find your BIOS's boot options menu. The boot options menu of your BIOS may vary in location or name from the illustration, but you may eventually find it if you search around.

If you can't find the boot options menu, search the name of your BIOS (most likely located in the BIOS menu) online for help.

3) Select the CD-ROM drive as the first boot device of your computer.
Although this method may vary among computers, the boot options menu is typically a menu of movable device names where you should set your CD-ROM drive as the first boot device. It can also be a list of devices that you can set the order of their boot on. Consult a manual or the internet for help if you're stuck.

4) Save the changes of the settings. Press the button indicated on the screen or select the save option from the BIOS menu to save your configuration.

5) Shut off your computer. Either turn off the computer by choosing the shut-down option in your current operating system, or hold the power button until the computer powers off.

6)  Power on the PC and the insert the Windows 7 disc into your CD/DVD drive

7) Start your computer from the disc. After you have placed the disc into the disc drive, start your computer. When the computer starts, press a key if you are asked if you would like to boot from the disc by pressing any key. After you choose to start from the disc, Windows Setup will begin loading.
If you are not asked to boot from the disc, you may have done something wrong. Retry the previous steps to solve the problem.

8) Choose your Windows Setup options. Once Windows Setup loads, you'll be presented with a window. Select your preferred language, keyboard type, and time/currency format, then click Next.

9) Click the Install Now button.

10) Accept the License Terms. Read over the Microsoft Software License Terms, check I accept the license terms, and click Next.

11) Select the Custom installation.

12) Decide on which hard drive and partition you want to install Windows on. A hard drive is a physical part of your computer that stores data, and partitions "divide" hard drives into separate parts.
· If the hard drive has data on it, delete the data off of it, or format it.
· Select the hard drive from the list of hard drives.
· Click Drive options (advanced).
· Click Format from Drive options.
· If your computer doesn't have any partitions yet, create one to install Windows on it.
· Select the hard drive from the list of hard drives.
· Click Drive options (advanced).
· Select New from Drive options.
· Select the size, and click OK.

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