To install the OS, first delete the existing partition using D

Use C to create a partition

Specify the size of 1st partition

Then specify next partition size

8 MB  will always be reserved for system partition MB

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If there is no problem at the BIOS level, the CPU will search for an Operating System installed on your HDD. For a brand new HDD, if you are installing Windows XP
Insert the Windows XP installation CD in the CD ROM drive and reboot.
Press del again to enter the computer BIOS settings to set CD Rom drive as the first boot-up device.
Reboot your computer to start the Operating System install.
Once Windows XP is completely installed, the other additional hardware like modems, network card, sound card can also be installed.

STEP 1:
Install your motherboard on the casing first. Put plastic stands-off under motherboard. Place in position in casing and install all screws required.

STEP 2:
Mount the CPU on the motherboard - being careful to position as required, as the fine pins are quite soft. This may take some time. Install the Cooler Fan Heat Sink assembly. Apply the paste which adds adhesion and contributes to the cooling effect on the top of CPU before clipping on the fan.

STEP 3:
Install the RAM module. To allow for easy insertion of RAM, push the white levers on both sides down. The gap in the RAM module should be matched to the slot. Push down the RAM firmly and pull the levers back up. They will click into position.

Any new motherboard should come with a diagram of the RAM layout. If there are empty slots a single ram module must be installed in the proper order.

STEP 4:
After the RAM is installed, the graphic card should be installed. It is usually next to the RAM slots and the may have to be pulled out if  the RAM was installed later .

STEP 5:
Install all the drives - the DVDRom, Floppy Disc Drive and HDD.

STEP 6:
Wiring up. Fit all your drives data cabling for the HDD, floppy disk drive (if needed) and DVDRom drive. These cables carry data signals between  hardware and the motherboard. They should be installed with their red edge facing the power supply plug.

For most motherboards, the primary slot is assigned to the HDD, the secondary slot will support an additional HDD/DVD Rom drive and the third slot will support the floppy drive.

STEP 7:
Connect up the mouse, keyboard and monitor.

LAST STEP:
As a last step, connect up all power plugs to the motherboard and drives. The main power source from the power box should be connected first.

1. CPU with Cooler Fan.
2. Compatible Motherboard
3. Ram module
4. HDD - with IDE cable
5. DVDRom Burner/Drive
6. Floppy Disc Drive - with cable
7. Graphic Card
8. Computer Casing with Power Supply box.
9. Modem
10. Sound Card
11. Network card (optional)

If you wish the Monitor, Keyboard and mouse can be salvaged from your “old” working computer system. Monitors are usually expensive and take up a lot of space, so it is better to use the old monitor. The keyboard and mouse get worn out quickly, so getting new parts is better

Hardware accessories include screws, plastic stands off ( to lift the motherboard off the enclosure), Plastic Ties.

Requirements for assembling a custom built computer :

1. Intermediate to advanced knowledge of  computer hardware and assembly. You should not only be able to read and understand component specifications and assembly instructions, but also be able to fit components together and ensure that there are no loose connections.  If you are not proficient, it is advisable to hire the services of  a computer technician for a few hours.

2. Tools :   Magnifying glass,  small flashlight , a set of  Philips screwdrivers for assembly and needle nose pliers. An anti static wrist strap is also recommended to prevent damage to components.

Some of  the advantages of  buying / building custom built computers are :

1. You pay only for the components and hardware you need and use. Every computer user uses the computer for different applications. Most mass produced computers have some hardware features which are not used by many users. This hardware can be eliminated, reducing the overall cost of  the computer.

2. More user friendly : For a custom built computer, there is a lot of  flexibility in selecting  the cabinet , so that USB / parallel ports can be easily accessed  and peripherals like printers connected or disconnected from the computer. Though major manufacturers like HP hire some of  the “best” designers,  USB ports for many PC models cannot be accessed from the front of  the PC.

3. In case of  component failure, you are not dependent on the manufacturer and you can use a similar component  of  any other make , if the specifications match .