antivirus reviews & maintenance tips for home office and small business
Home FAQs Computer Viruses

Computer Viruses

What are 0-day attacks?

The apocalyptic-sounding name of zero-day (or zero-hour) attack or threat refers to malware that exploits a yet unknown security flaw in a computer program.

As you can read in Wikipedia "the term derives from the age of the exploit. When a vendor becomes aware of a security hole, there is a race to close it before attackers discover it or the vulnerability becomes public. A 'zero day' attack occurs on or before the first or 'zeroth' day of vendor awareness, meaning the vendor has not had any opportunity to disseminate a security fix to users of the software."

Read more: What are 0-day attacks?


What are Botnets?

The objective of most of today's malware is no longer to damage a PC but rather to penetrate a computer and make it part of a "bot net".

Botnets are networks made of thousands of malware-infected computers, which become bot net nodes or "zombies'. These networks are the foundation of a massive online criminal activity.

Read more: What are Botnets?


Why do I need to update antivirus software regularly?

The most traditional method used by antivirus software  to assess if a piece of software is suspicious or not, is to compare it against an entire collection of known viruses and check whether it resembles any of those "closely enough".

Read more: Why do I need to update antivirus software regularly?


What is Antivirus Software?

A computer virus is tiny piece of software, which usually "hides" itself inside an otherwise legitimate file, like an email, a game, or even a normal web page. Once landed on your computer, it will either stay silent, waiting for a certain time in the future to action itself, or it will immediately unleash its "load", while being executed along with the "carrier" file.

Read more: What is Antivirus Software?


What is a Computer Virus?

A computer virus is a program that has the unique ability to replicate. Like biological viruses, computer viruses can spread quickly and are often difficult to eradicate. They can attach themselves to just about any type of file and are spread as files that are copied and sent from individual to individual.

Read more: What is a Computer Virus?


Do I really need an Anti-virus?

Virtually, no one who uses Windows-based computers is immune from viruses. Every time your computer handles a new file, chances are that it could be infected. In particular, that is the case when you open attachments in your emails, when you download a program from the Internet or when you copy a file from one computer to another. Unless your computer is completely isolated from the outside world, which would make it pretty useless, the risk of infections is quite high.

Read more: Do I really need an Anti-virus?