The Greek Series:



                                                                     AM Computer Service
                                                                                Boot Up Your Computer:


         Everyday people start there computers, not knowing what is involved with the startup and how it could impact your
         computer and the loading of your operating system.

The term booting comes from the phrase " lifting yourself up by your bootstraps" and refers to the computer bring itself up to a working state without intervention from the user.

There are two types of boot states: Hard boot or Cold boot and Soft boot or Warm boot.
A hard boot is more stressful on your computer because of the initial power surge through your computer that occurs when you press the power switch.

A soft boot or warm boot involves using the operating system to reboot, for Windows XP, one way to soft boot is to click Start, click Turn Off Computer, and then click Restart.

Windows NT2000 and Windows 9x/Me, click Start, click Shut Down and then select Restart and click OK
For DOS, pressing Ctrl, Alt, and Delete at the same time performs a soft boot.

The startup BIOS (Basic Input Output System) controls the beginning of the Boot. This is programming
contained on the firmware chip on the motherboard that is responsible for getting a system up and going and finding the Operating System to load. a successful boot depends on the hardware, the BIOS, and the OS all performing without errors. errors are communicated as beeps or as messages onscreen. The boot functions are broken down into four steps.

1. The startup BIOS runs the Post (Power on self test) this is a series of tests performed by the BIOS to see if 
    it can communicate correctly with essential hardware components required for a successful boot.
    The startup BIOS surveys hardware components required for a successful boot. It then begins the startup
    process by reading configuration information stored primarily in CMOS Ram, (a special kind of low-
    power  memory that stores information of a computer. it is operated by a battery so it does not a leave
    when the computer is turned off.)

2. The BIOS program searches for and loads the OS, most times the operating system is loaded from logical
    drive C on the hard drive. Configuration information stored in CMOS Ram tells startup BIOS where to
    look for the OS, Most new BIOSs support loading the OS from the hard drive, a floppy disk,  CD, DVD
    or USB device. The BIOS turns to the specified device, reads the beginning files of the OS, copies them
    into memory, and then turns control over to the OS.

3. The OS configures the system and completes its own loading, OS checks some of the same settings and
    devices that startup BIOS checked, such as available memory. Then the OS loads the core components
    necessary to access the files and folders on the hard drive and to use memory, the expansion bus on the
    motherboard, and the cars installed in these expansion slots, the OS also loads the software to control
    installed devices, such as the mouse, video card, DVD drive, these devices generally have device drivers
    stored on the hard drive, Then the Windows desktop is then loaded.

4. Application software is loaded and executed and the user is in control.