Because computers are run by operators,User Error is most common cause of computer malfunction.When user is at computer,he or she may add or delete certain files.Or he/she may remove or exchange certain hardware features.

When we look at user error,we must remember that since we're human,the user error may be easy to solve by simply asking last user if he/she installed any software,re-configured any software or hardware settings,etc.

A large percentage of computer malfunctions are due to environmental factors such as power surges caused by lightning, resulting in overvoltage.

Another cause for failure may be room temperature being too high or low,as well as dust,dirt,or sunlight.If you're in business and heavily dependent on your computers,such fators as room temperature,sunlight and protection against power surges is of utmost importance and simply cannot be overlooked.

The most common pc problem is when you can't access your PC at all.When you turn on power switch,NOTHING HAPPENS.

Here is a quick checklist of troublshooting procedures you should follow if you encounter this problem .We also have videos you can download from Internet should you need assistance in just how to perform these procedures:

Try Power Switch a second or third time.If nothing happens..

The key to finding right one for you is to step back and consider exactly how you plan to use your laptop. When you define what you need before you go shopping, buying right machine becomes much easier.

Here are 5 basic factors to consider:

======== 1. SIZE ========

In world of mobile computing, size definitely matters. The size of a laptop affects two key areas: portability and display size.

If you're always on go and will be using your computer only in short bursts, a so-called ultralight will save you some shoulder strain.

On other hand, if you're going to spend hours in front of your laptop, a larger display may be in order.

Today, some laptop displays exceed 17 inches, rivaling display size of many desktop systems. The down side is that these monsters can easily weigh three times as much as an ultralight.

============== 2. HARD DRIVE ==============

Speaking of size, what about size of hard drive? One way to approach this issue is to ask yourself following question:

Will this be my primary computer, or will it supplement my desktop system?

If former, you should look for a bigger hard drive - 60 GB or more.

If latter, you may be able to make it with a 20-30 GB hard drive.

But even this isn't absolute.

If, for example, you plan to copy a huge MP3 library from your desktop system to your laptop to make your music library portable, you'd be well advised to err on side of too big.

========== 3. MEMORY ==========

In determining right amount of system memory, or RAM, take a look at ways in which you intend to use your laptop: