tölvuveirur

Tölvuveirur, commonly known as computer viruses, are malicious software programs designed to replicate themselves and spread from one computer to another. These programs can attach themselves to legitimate files or programs and execute when the host file is opened or run. Once active, a virus can perform a variety of harmful actions, ranging from minor annoyances to severe system damage.

The primary objective of many viruses is to disrupt normal computer operations. This can include deleting files, corrupting data, slowing down system performance, or even causing a complete system crash. Some viruses are designed for espionage, aiming to steal sensitive information such as passwords, financial details, or personal data. Others may be used to create botnets, enlisting infected computers into a network controlled by a hacker for launching attacks on other systems.

Computer viruses are typically spread through various means. Email attachments are a common vector, as are infected downloads from the internet, compromised websites, and removable media like USB drives. The proliferation of social media and online file-sharing services has also contributed to their spread.

Preventing computer viruses involves a multi-layered approach. Keeping operating systems and software updated with the latest security patches is crucial. Installing and maintaining reputable antivirus software and performing regular scans can detect and remove many threats. Users should also exercise caution when opening email attachments from unknown senders or downloading files from untrusted sources.