1- the system and the programs are outdated :

Update your operating system and software you use is considered very important. Developers always produce continuously updates to operating systems and the various programs in order to prevent security vulnerabilities that may make the computer vulnerable to penetration or virus infection. If you work through the system without Windows updates or an old version of Java, it is possible to be infected your computer with great ease.

Try to update your software continuously and immediately after the release of these updates, but prefer not to update Windows system your updates once issued, and that, because a lot of times you Microsoft Corp. released an update badly may affect the device, but that during the past few months the company has released an update destroyed some devices so that she could not even access the BIOS screen. Accordingly, preferably updated Windows system after issuing updates of its own, and must search for the results of these updates to other devices via the Internet.
 

2- Your computer is unclean :



The most important problems that may infect your computer is dust. Many users complain of increasing the temperature of the CPU or GPU, whereas the dust often lead to these problems, but it is the last thing the user thinks about it.
When the dust is increasing, it may increase the temperatures of components, as a result of clogged fan processor or graphics card, which increases the temperature, and this may lead to a lack of performance, but it may lead to the inability to enjoy the games or.
Preferably clean the computer every two weeks.


3- running many anti-virus programs in the same time :

It may lead to a conflicts between them and that is very dangerous for the computer because the anti-virus is directly connected to the operating system files and they could be deleted and destroy the system itself.



4- Install non certified programs :


The user must install the software that are known and trusted only. Some download sites require you to install other programs, and often these programs are a malicious software may harm your computer. So, preferably download from trusted places only known programs.