Resident viruses embed themselves in a computer’s memory and infect files when the operating system performs a specific function. They can attach themselves to antivirus programs, making them difficult to remove. Virus designers consider infection rate when developing a virus, with some moving quickly and others more slowly. Removing a resident virus may require specialized tools or professional help. Antivirus companies and operating system designers release patches to remove resident viruses. It’s important to use reputable sources for virus removal software and to check the browser’s address bar before downloading.
A resident virus is a computer virus that embeds itself in a computer’s memory, activating itself whenever the operating system performs a specific function in order to infect files on the computer. This method of viral infection is in contrast to a non-resident virus, which actively searches for files to infect. Resident viruses can be quite harmful, as they can spread through a system so completely that they even attach themselves to antivirus programs, infecting the very items they scan for signs of viral infection.
There are several ways to design a resident virus. Virus designers have to think about the infection rate when developing a virus. Some are fast infected, moving as quickly as possible through a system with the aim of doing the most damage. Others move more slowly. Fast-moving viruses tend to reveal themselves because they cause operating system performance problems, but this may not be a problem in the eyes of the creator since the damage is already known. Slow-moving viruses may be better positioned to infect other computers or stay hidden for a long time.
Removing a resident virus that has embedded itself in a computer’s memory can be a challenge. The virus can be designed to resist the actions of conventional antivirus software or, as discussed above, to exploit the software. You may need a specialized virus removal tool to extract the virus from memory. In some cases, the services of an information technology professional may be required to completely eliminate an infection from a computer.
When a resident virus is identified by an antivirus company or an operating system designer, a patch is often released. This could be an update to an antivirus program that allows the program to remove the virus, or it could take the form of a virus removal tool that the computer user can run to purge the resident virus from memory.
Looking for tools to fight viruses can be challenging. Unscrupulous people may release programs that claim to fix viruses, but actually load more viruses or other harmful programs such as spyware onto a computer. Computer users should look for reputable sources for virus removal software and advice such as official websites for operating system manufacturers or antivirus programs. It’s a good idea to get into the habit of checking your browser’s address bar to confirm you’re on the right site before starting a download or filling out information.
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