A computer virus (also known as a worm) is a form of software program which, when run, changes the internal workings of the computer and inserts its own code into the affected areas. Once this modification succeeds, the infected parts are said to be infected with another computer virus.
In simple terms, the program will replicate and install the infected software program into the computer’s main memory, hard drive or other location where it can reproduce and propagate itself. The infected software program can then enter into the registry of the computer, changing the settings of the system’s configuration. The virus can then infect other computer systems, including those of people using the infected system. If the virus can infect other computers, the computer system can be made to perform functions other than the one intended.
These viruses can be installed onto a computer with the intention of causing it to function in ways that are not intended. Some viruses cause their infections to affect a computer’s network and consequently, other networks can be made to function at half the normal level. Other viruses can create programs to collect personal information and use these for spamming purposes or even for illegal activities.
However, these viruses can be a nuisance or a real danger. Viruses can lead to loss of data and other computer issues such as crashes and freezing. When a virus is accidentally or deliberately installed on a computer, there is no way for the user to detect the presence of the program unless the user deletes it manually. This leaves a person open to further risk such as identity theft, denial of access, malware attacks, and damage to the machine’s files.
Although computer viruses are becoming more common, they do not pose a threat to our safety, because they have never harmed anyone directly. The only way a virus can harm us is if we allow it to change our computer settings and files and if it causes problems that are too much for the system to handle. Fortunately, these days, there are several different types of anti-virus software that can help protect against these types of threats.
Most anti-virus programs can detect and remove the most common forms of viruses such as adware, Trojans, worms, Trojan horses and other malicious software programs. There are also anti-virus software programs which are able to identify and delete files that have been infected with viruses as well as any other files that have been accidentally deleted.
Fortunately, if you already have a good anti-virus software program, it should be able to detect and remove the most common forms of viruses. As an extra measure, you should also run a registry scan regularly to ensure that your computer system is working correctly.