Computer Networking & Security

Archive for April, 2009

The elementary thing you should define when you make up your mind to purchase a laptop computer is the purposes for which your laptop will be applied – no matter if it will be a mini-notebook for moving around or a gaming laptop for computer amusement. Still, there are some elementary types of laptop computers that are devided according to their operations: The first group – office laptops. These are trendy laptops that are mostly distributed in a great number of various countries. Office laptop computers have the necessary software with a fantastic design, and all the general features of a stationary personal computer. This type of a laptop computer is in particular used for seminars, presentations and other activities, but as the name suggests numerous people buy a notebook for their company in order to be totally independent of their subordinates. And not only that- an employee of the company might simply take a notebook home to complete the job. The price of office laptop computers can be various from those very cheap to the most pricey ones.

The next kind of laptops gets a powerful battery, which is very important if you want to use a laptop computer on a long travel. This sort of laptops is preferred largely by those whose work is connected to business or frequent move. They are created of practical materials that gives you the opportunity to work with them in delicate conditions of environmental exposure. These laptops are commonly applied by modern businessmen, who are regularly on the go.

A specific class of laptop computers with unique design are promo laptop computers. These laptops are particularly used and afforded by affluent people and they demonstrate the cultural position of its owner. Quite often, they are made of special materials: leather, carbon, aluminum, steel, precious metals, etc. which designate the exclusivity of a special kind. As Well, you might frequently find out touch notebooks of this sort – one of the current developments applied in computers.

It is very important to check a used computer thoroughly before buying it as it may lead to problems in the future. A hard drive will not show any outward signs but may be deteriorating. The same way the needle can suddenly slip and can cause scratches on the disc ultimately leading to memory loss as used computers can fail any time. If they are checked, the faults which may occur can be known. Let us first see the possible faults which may occur while purchasing a used computer.

Hard disk failures can happen due to heavy wear and tear over a period of time. The read and write heads of a hard disk are used to retrieve or recode data stored on the hard disk with the help of a disk platter rotating at a high speed. Over a period of time the risk of failure or malfunction of disk increases. Faulty sectors of the hard disks can be found out only if a full surface scan is done on the used computer. The scanning time depends on the capacity and size of the hard disk of the used computer. Many skip this procedure due to the time consuming process of scanning the whole disk and end up purchasing a used computer with a faulty sector.

Next is to look for any possibilities of the central processing unit getting freezed. Normally all the central processing units have a fan and heat sink for keeping the unit cool. Over a period of time the fans may not work properly due to the accumulation of dust and dirt resulting in over heating of the central processing unit and even leading to stopping from functioning. While buying a used computer the fan needs to be checked and if any abnormal sound is heard, it is not good for purchase.

The used computer may have a higher possibility of getting crashed and freezed due to the usage of the operating system for a good number of years. There may be a cache or RAM fault due to the over exposure leading to loss of data. To increase the performance of the computer and to avoid crashing, the operating system of the used computer can be reinstalled with a new operating system or a fresh one.