What Is Antivirus?
A good antivirus is crucial to protect your computer from online threats. However, even if you own the best anti-virus globally, it is meaningless to update the virus definition.
Virus definition is used to detect viruses or what we called “virus signature.” Using this kind of detection, anti-virus software can detect many viruses that have the same signature code.
For example, let’s say there are two viruses.
- Virus A and
- Virus B.
Both of these viruses are in the same family. Hence, both of them are using the same signature code inside their code. Therefore the anti-virus can detect both of them. You can say that this type of detection is more accurate than heuristic analysis detection.
Another type of detection used by anti-virus is called heuristic analysis. This type of detection, however, sometimes will mark a non-virus file as one. Heuristic analysis is used to judge whether or not a specific program or application can be a virus or not.
Heuristic analysis detection comes into play when a server or a website passes a particular vulnerability scan. As a heuristic, this type of detection will consider some cryptography and coding errors that a human might commit using a program.
Heuristic analysis is used to block off viruses entering a computer. It does this in two ways. Heuristic software scans the incoming information and matches it to a database of known viruses.
Secondly, heuristic detection will compare the program’s source code against its stored virus signature. A match means that a virus has entered the system. It will automatically send out packets of information relevant to the detected virus to deceive the user.
Update of Antivirus Software
Who can update anti-virus software via the Internet to keep it relevant for preventing the viruses from spreading any further? Frequent updates are given to all anti-virus software to keep them relevant for protection against the latest threats.
A computer virus can infect your computer via a file or an e-mail attachment. Even being a victim of a virus can’t shield you from being infected yourself. Therefore, prevention is better than cure. Have a virus detector software installed on your computer. This will notify you when a virus is detected.
Usage Of Antivirus
Be careful of all e-mails with attachments. They are the common carriers of viruses. Before opening an e-mail, carefully scan its attachments. Don’t open them if you are not sure of the sender. It is advisable to set the “Preview Pane” option to “Normal” to view the attachments first and decide whether to open them.
Be careful of the speed of your computer and its memory. If your computer is running slow, it is a clear indication that you’ve been infected. If you’ve saved a file online and then tried to open it, it usually won’t open. This is because the file has usually been put into the Temporary folder, which Windows Canada, Windows NT, Windows2step, etc., will recognize as a cache folder. Software utilities typically use these folders to save placeholders for essential files and operations.
If you find that the above strategies don’t work, you can try deleting the file itself. Using the Windows Task Manager, go to the Eject a program or files section and choose Delete files under the file or program that is hurting your computer. Remember that this will delete the file, not the computer.
Securing Your Hardware knowledge that there are security risks to downloading free files or software from the Internet. Even seemingly harmless tasks like sending an e-mail can quarter the files or software on your computer or cause them to malfunction. Unless you are confident that the application is safe, could you not download it?
Other kind of security risk
The other kind of security risk is caused by the wireless network you’ve connected to. If you haven’t configured your firewall correctly, anyone with a sniffer or a malicious wireless card could be poking into your network connection.
Even having the best wired or wireless network connection isn’t protected from viruses and other external threats. If you haven’t configured your system correctly, anyone with a sniffer could install sniffers on your computer or be sniffing files off your hard drive
The simplest way to secure your connection is by using security such as Layer 3 encryption or SSL. You can also configure your firewall to delete all packets of data going through your network connection before they reach your screen.
If you have an older version of Windows, even an earlier version of Windows XP, there is no firewall automatically set up for you. In this case, there are two possibilities:
If you don’t have any personal firewall software installed, you should do so right away.