If your computer is used a lot and keep it on for hours at a time it’s a good idea to clean it every now and again, one of the main problems is dust. Cleaning out this dust can extend your computers life and make keep it running faster and quieter.

If you have a desktop computer then the main place dust accumulates is around the CPU unit and fan areas. To prevent your processor from over heating there is a fan connected to a heat sink which sits on top of the processor to disperse the heat. This fan blows air down on to the heat sink to cool it down as the heat is passed up from the CPU. Because the fan is constantly blowing air it also blows the dust particles in the air in to the heat sink, over time this can clog up the computers heat sink reducing its effectiveness. Because of the dust your fan may have to blow faster making it louder and more costly to run. Normally you can see if the fan is clogged up simply by opening your computer up and looking at it. If your fans heat sink is really clogged up with dust and dirty looking it is a good idea to give it a clean. When dealing with the inside of your computer or anything electrical ensure the power is turned off and it is unplugged first.

The best way to clean out the insides of your computer is by using a can of compressed air and special nozzle, you can buy these from any good computer store. The spray nozzle is useful for getting in to those tricky places. When spraying the compressed air on to your computer, make sure you don’t spray it for to long as condensation may form some drops of water. After blowing away any dust from your computers heat sinks give it a gentle wipe over with an anti-static cloth. You can also use the compressed air to clean your power unit and keyboard.

Cleaning the inside of your computer doesn’t take long providing you have the correct equipment, and once done you notice an immediate improvement in your computers performance. The fan wont need to blow as hard so it will be quieter and thanks to the processor running at a cooler temperature your whole computer should generally run faster. I try to clean my computer every 4 or 5 months to keep it running efficiently.

Laptops have become a necessity these days.  Used laptops are seen as a viable option to own a laptop at a very affordable price. These are the laptops that have been used by a person for sometime and sold for some reasons.  Even if the laptop is used for a single day, it is called as a used laptop.

The reasons for purchasing used laptops are many.  The main reason is that, it is available at a cheaper rate than the retail price of any new laptop.  The availability of used laptops has increased owing to the recycling legislation that makes discarding of old PCs very expensive.  Also used monitors are used for photo editing as the CRT monitors provides ultimate color purity than the LCD monitors for editing colors.

When purchasing a used laptop it should both serve functionally and at the same time save money.  Doing a little amount of research by comparing and weighing various options from different kinds of sources will help in achieving the aim to buy used laptops at the best possible price.  The price of the used laptop should coincide with the features.  Internet serves as a good source for searching used laptops.

The working condition of the used laptop is of utmost importance.  Normally it is not recommended to buy a laptop, which is more than three years old, for the reasons that either the system would have become outdated, or the user may not be able to run the latest applications and soft wares on it.

The features on the used laptops are the next important thing to be taken into consideration.  The speed of the used laptop needs to be checked as used laptops run at a lower speed than the normal desktops with the same processor.  Used laptop with less than 128 MB memory is not at all recommended for buying.  The screen size, resolution and definition are other important factors in a laptop.  Portability of used laptops is also taken into consideration.  Laptops these days are getting slimmer and lighter.  The weight of the backpack and, accessories should be kept in mind along with the weight of the used laptop to see if it is comfortable to carry.  It is wise to purchase an extra battery while buying used laptops as the battery life of any laptop can be only for two years time.

While buying used laptops, checking should be done if it has a wireless connectivity, if not at least should have an external wireless card, since connectivity to the internet and intranet is very common these days.  Select the one with a longer range and greater speed.
Check for a USB ports as older laptops may not have them.  The more the USB ports the more convenient it is.  Also the hard drive of the used laptop needs to be more than 20 GB.  The higher hard drive space of the used laptop purchased depends on the budget of the buyer.  These days, songs and movies are stored in the laptops requiring larger hard disk space.  The most important thing is to buy a used laptop from a reputed dealer so that the purchaser can get a warranty on it.