When it comes to online computer security there are hosts of different options. A big deciding factor when choosing protection is whether you should pay for it or not.
The security itself comes in the form of a program you install onto your computer. This program runs in the background at all times. If you happen upon any viruses, malware or spyware, when online the program will ‘quarantine’ and delete theses immediately.
Free versions of virus security are available online. Some of the programs like AVG are very good and provide just as much protection as paid versions. There are some that are not as reputable. Its important to research well to make up for the lack of money you are putting into the program.
A subscription based program can be great as there are usually regular updates from the developers. Obviously there is a price for it, but the quality of the program is usually better because of it.