anatomi antivirus, rules of best practice in the use of antiviral

From a device that I think is very credible. But the fact that there are so many files that the suspect as a virus in a computer laptop or similar device.Antivirus generally contain a component called a virus scanner. Virus scanner itself features that automatically detect and get rid of the virus before it is active. You know of course all there tujannya. Detecting viruses before the virus is active in order to detect and remove viruses before the virus causes damage, such as file deletion, overwrite certain files, add or subtract files.There is a similarity between the virus scanner software denan instusion detection system (IDS). They are the same - the same work by examining the source code on the system or want to enter the system.

There are 4 main types of virus scanners are:
    monitoring activities, monitoring changes and integrity, pure scanners, hybrid.
The explanation:
Monitor the activity is the oldest type of antivirus software. Medium works the same way with the IDS, which detects the presence of a pattern of suspicious activity that could indicate a virus activity.
Monitor changes and work with the engineering integrity check if the file has changed by checking the checksum of integrity. This technique is prone to error in the sense of having a high false positive trend is something that is not a virus but the virus can in thought.
Pure Scanner works by examining the system, user files, boot sector and memory and see if there is a virus or not.
Hybrid is a combination of the above techniques which many in use by antivirus software.
There are things you need to consider when you install antivirus software, you should know a few rules of best practice in the use of anti-virus, among others:

1. Do not use antivirus arbitrary, except from a trusted developer of antivirus and famous.     
2. Do not download the file when updating signature, except from trusted sources.
3. Perform regular backups to avoid losing important files.
4. Apply strict access control.
5. Do not open attachments in suspicious emails.
6. Do not open unknown email or suspicious, such as email that has the same header, but with a different sender.

So a few things you should know when you want to install antivirus on computer or laptop or andrioid and the like.
No bad if you keep the one you love than to lose precious things of your own.
Finally, this article may add insight to me in particular, and you in general. Sources: Tricks securing computers for beginners (ali zaki work and community smitdev)