Computer viruses
A virus is a small piece of software code that is placed on real programs on the computer. For example, the virus is linked to a program on the computer, such as spreadsheets. Every time the spreadsheets are run, the virus also runs. The virus has the ability to produce many copies of it that are attached to other programs. other and disable it.
Types of viruses
There are several types of viruses, and they differ from each other in terms of their effect on the infected device, including the following:
- Viruses that infect files, and this type associates itself with programs bearing the “EXE” extension. or “COM.”.
- Mutant viruses (in English: Polymorphic viruses), and this type of virus has the ability to change its code without changing its mechanism of action; This is to avoid detection by anti-virus software, especially programs that rely on virus detection by fingerprint analysis.
- Resident viruses (in English: Resident viruses), which hide themselves in the random access memory (in English: RAM) of the system, so the virus can infect new files and programs even if the original file of the virus is deleted, and usually this virus starts working when the operating system is activated (in English: operating system) for a program or the start of a specific work.
- Rootkit viruses (in English: Rootkit viruses); And it installs Rootkit on the target device, which are programs that allow the execution and activation of administrative commands on the computer, so that it can modify or disable the system programs or functions, and this virus is able to avoid most anti-virus programs; Especially those that do not scan the rootkit programs on the device.
- Viruses that infect the boot sector, and this type of virus installs itself on the hard disk or flash memory (in English: USB flash drive) or other so that it starts working as soon as these devices are activated.
Ways to protect the computer from viruses
There are many simple steps that can be taken to protect the computer from viruses, including:
Read also:Solve the problem of slow internet- Use an antimalware app.
- Do not open emails from unknown or familiar people, and do not open attachments in these messages unless it is an expected attachment.
- Using a pop-up blocker with your internet browser, which are small pages that appear on top of websites.
