Every users is worried about some security concern with their system. But what exactly does system security mean? Simplified, it means keeping your PC and of course, its data secure and safe. In the present age, most of private data are stored in the computer or flash drive. But some of us don't have the fundamental knowledge of keeping those data in safety. This knowledge is very simple; all you have to do is following some uncomplicated rules that will improve the security of your PC hugely. First of all let's see what the web connection is all about. We can take up a comparison- a computer with web connection resembles your very own house. Your house has many openings- doors, windows. With the increase in number of openings, increases the number of chances for "peoples" to enter into your house. I am not saying that some robbers are going to come, but more openings imply more chances of getting robbed. So to check these visits from strangers you need to install a quality firewall and also update this installed firewall software on a regular basis. It's not a headache to update your software or OS. Microsoft Windows Update feature is a good instance. Ensure updating all your installations of your system. You will come across two basic kinds of firewalls. Both of these (one, hardware and another, software) carry out the same task. Generally, a hardware firewall is included in your router in case you use one but you may not have a software firewall on your computer. Sometimes we quite foolishly let strangers come in. just opening an email or browsing the net can invite strangers. Your guards are often fooled by viruses, Trojans or spyware. Sometimes an email from your buddy can carry a fatal virus. So how does your computer fight these unwanted ‘guests'? - By installing anti virus software. Today, antivirus software falls under a huge category. Usually these packages or suites include a spyware scanner and a firewall. Although these guards are quite effective in their jobs, you are advised not to relax and rely completely on them. The security plan of your computer's requires multi-tiered protection plan but they are just a single layer. The ultimate yet one of the most crucial advices that I must give you is that your computer's anti virus software should always be in a state of updated. They should be updated manually regularly since your computer can be subjected to new threats everyday.