The best way to set up a computer is to follow a Manual Guide.

A Manual is a set of technical texts that describe setup and maintenance of equipment. If anything goes wrong, you can always refer to the manual at least you can get the support email or telephone number of the manufacturer when you purchase your computer, it is not exactly understandable what gets connected to what.

In detail, Computer , Monitor, Keyboard, Mouse, Printer and Modem/Router coming all together is what frightens most first-time users. I have to admit it, I feel like a little kid sitting on the floor reading the manuals as all the cardboard and plastic lays all over the place.

Anyway, back to “reality”. There are basically two ways to assemble your computer: out of the box and “piece meal”. Most would prefer the “out of the box,” because it is less disposed to problems.

[center]OUT OF THE BOX[/center]
When your computer is delivered, the first thing you should do is take inventory. Have the list of features that you are supposed to get and check them off. No matter how good a provider is, they will make some mistakes. What makes a good provider is a quick and positive response to your problems.

Here is a list of what a computer should come with:

-Software: make certain you have CDs of all software (including Windows and DOS)
-Cabling: you should have two power cables and may have a VGA cable (has a metallic connector with 3-rows of five pins)
-Computer (either tower or desktop), monitor, keyboard, mouse
-Manuals (a must!)

HOW TO INSTALL A COMPUTER

Computer

Plug power cable into back of computer.
Plug power cable into power strip or wall outlet.
Monitor

Plug power cable into back of monitor.
Plug power cable into power strip or wall outlet.
Plug data (15- or 9-pin) into back of computer (make sure that it is video).

Keyboard

Plug data cable into back of computer.
You will find a circular or usb connector that will mate—don't force it.

Mouse

If the data cable has a circular connector, find the mating connector on the back of the computer.
If the data cable is 9-pin and rectangular-shaped, plug into a 9-pin female connector on back of computer.

Printer

Connect power cable or adapter.
Plug power cable into power strip or wall outlet.
Connect wide end (50-pin) of data cable into printer.
Connect narrow end (25-pin) of data cable into female connector in back of computer.

Modem/Router (External)

Connect power adapter.
Plug power adapter into power strip or wall outlet.
Connect the cable from the router to the computer network port.
For Universal 3.5G modem just socket it to the USB port of the computer
For a WI-FI, switch on the Wireless device then search with your Computer and connect (if the computer has wireless feature)

Now your computer is ready for work.

Source: http://bestawareness.com/how-to-install-a-computer/