If you encounter a virus attack, do something at once to prevent the spread of the virus to your system. First, concentrate on the kind of virus to remove the malicious code. There are tools which are available online tailored for that specific virus causing the damage. Next is to see the range of the damage done. If the operating system is completely destroyed, you will have to reinstall. This can be done by using the quick restore CD that comes with your computer. But before you start the process, make sure that you have the necessary information like licenses, registration and serial numbers available. Then do a thorough virus scan of your network. Be sure your anti-virus software is recently updated and that your security patches are up-to-date to prevent future attacks.

The AVG free edition anti-virus is the most common used anti-virus software or protection tool. AVG is enclosed with automatic updates whenever you turn on your computers. In fact, for as long as the product lives, the user of this protection tool will be privileged to make use of it. AVG Free is trouble-free to use and will not slow your system down (low system resource requirements). Special Features include automatic update functionality, AVG Resident Shield that provides real-time protection as files are opened and programs are run, free Virus Database Updates for the lifetime of the product, and AVG Virus Vault for safe handling of infected files.

Both spyware and a computer virus are forms of unwanted or malware (malicious software) that can be harmful and give nuisance to your computer. The difference is that spyware collects information without any notice or consent. Spyware will not actually harm or corrupt the data on your computer but as stated earlier, it can give nuisance because it takes control or your computer. Anti-virus programs or software cannot remove spyware, so there is still further study of some anti-virus developer to create an antivirus that also features anti-spyware. There is a lot of ways on how Spyware can be installed on your computer. One is via virus and another is by being secretly attached to the software that you want to install or download. Furthermore, spyware is a specific type of malware that collects information about you and your computer, without you knowing it. Meanwhile, virus is just a specific way of having spyware get into your computer and be secretly distributed via e-mail or instant messaging.

A firewall is like a guard that allows or prohibits intruders to the network. It has a control policy that indicates and dictates what should be denied and permitted to access the network in order to protect the network from any harm. It is a preventive measure and not completely the solution to viruses or any harmful things that can be acquired in the internet. It is designed to protect and not to heal infected data. Firewall is not able to do that. Unlike anti-virus software, it updates and scans the memory or programs when you reboot your computer. During the reboot, it can detect whether there are viruses, the location of the viruses and eventually cure it. Anti-virus software is designed for the purpose of healing and detecting harmful virus on your computer. In other words, even if the viruses had infected some parts of the data saved in your computer, it is still capable of adjusting allowing its features to cure the infected area. Compared to a firewall, it is designed only to protect and guard the network due to its control policy.