We all have heard of computer viruses and, of course, we know they aren't a good thing to have on one's computer, but most of us don't really know how a virus works. Here is some basic information about computer viruses and some helpful tips for preventing viruses and even finding a cure.

As you probably know, computer programs are built using source code and viruses are no exception. A virus is basically a computer program that will attach itself to other computer programs and continue to replicate attachments to files and your hard drive. It's very similar to an actual virus that replicates within our cells and then spreads to other cells. Except instead of making us sick, it makes our computers sick. This could mean that you will lose all of the open space in your hard drive or it could destroy various data files and programs. Sometimes they infect our email and send out emails to all of our contacts, spreading the virus even further onto other computers.

In general, most viruses are created specifically to attack those using Microsoft Windows, as this is the most commonly used operating system. However, if you use another operating system, it does not mean you are impervious to viruses or other types of malware. For instance, Apple Macintosh systems have historically been less susceptible to viruses, mainly because fewer people used them. As they gain in popularity we are now seeing a lot more malware targeting Mac computers.

The good news is that with a bit of caution, you can avoid many viruses. For instance, resist clicking on those pesky pop-up ads, especially the ones that say things like "your computer is at risk," or "virus detected." These ads often contain a virus, and when you click on them or click and download something, generally you are downloading a virus or other malware. Pop-ups are not just pesky; they can be hazardous to your computer's health. You also need to be wary with email. Delete emails from unknown senders and if a contact sends you an email that looks odd, maybe it has misspellings in the subject or no subject, just delete it. If you see an odd post on social media, the same rule applies. Many people get "hacked" on sites such as Facebook simply by clicking on a link, so always be careful when you click.

If you have not installed antivirus software on your computer, you should, even if you have a Mac or another operating system. An antivirus combined with a firewall is even better. Your antivirus program often will ask if it can make updates, and you definitely should let it do so. You also need to update your browser, such as Explorer or Firefox, when updates come up. These often have important security updates that will help make your computer more secure.

If you have a computer that has been infected, it can be a good idea to call in a professional service to clean up your system. At GeeksAKnockin, for example, the spyware and virus removal service includes the removal of all malicious software, they perform a comprehensive security audit to identify any vulnerability, they evaluate your system to ensure it is performing normally and they provide information to help you make sure that your PC is protected against future security issues.