Computer viruses are self-replicating programs that infect computers and use their resources without the owner’s permission. These viruses are much like those that infect the human body; they cannot reproduce on their own, and they need direction from the host in order to do so. Computer viruses replicate by attaching themselves to other programs, and every time that program executes, a copy is created. Viruses can include specific actions that can seriously damage or even destroy a computer system.
How Computers get Infected:
Before your computer can become infected, the virus has to find a way in. There are many ways for viruses to arrive, such as:
* Removable media like flash drives, SD cards and CD’s
* The internet, through malicious downloads and email attachments
* Shared folders on public and local networks
The creator of the virus has to find a way to get it onto the system, or to convince users to do it themselves. Attackers can find vulnerable systems, or trick users into thinking that a malicious file is something they really want. Once a computer is affected, users typically need Virus Removal in Alsip, IL.
How Infection Occurs:
The mechanics of virus installation vary depending on the target. Computer viruses can infect many objects, such as:
* Files -; data files are attacked when the virus inserts malicious code. Once that happens, the code forces the system to replicate the virus; these are known as file infectors.
* Macros -; Other viruses attack routines used by programs to perform tasks automatically. Macros are used in programs such as word processors; scripts are roughly equivalent, but are usually found in .exe files.
The MBR:
The MBR, or master boot record, is a system-critical area that stores instructions telling the OS how to start. Boot sector viruses target the MBR and only infect one type of target in most cases. However, as technology improves, future viruses may be able to infect more than one type of target.
Back in the early days of the Internet, viruses were the main threat to computer security. Since then, they have been supplanted by trojans and worms, which have seen greater media exposure as Internet use becomes nearly universal. Viruses continue to evolve as attackers clean up their code and add new malicious features. Even as virus authors sharpen their skills, virus removal experts at BLH Computers will help to keep your computer safe.
