Since computers have been used for a lot of purposes, no doubt that they are most of the time the targets of threats and danger.  Access to information is being sought.  Likewise, the existence of hackers for years gives more reason to owners to be very concerned about PC security. 

Achieving ultimate PC security normally come with considerable costs to the owner.  However, there are some free PC security softwares available in the market which prove to be equally helpful and useful.  These are commonly firewalls and internet security products that are free if they going to be for personal use. 

Some of the free personal firewalls available are ZoneAlarm, Comodo Personal Firewall, and Sunbelt Kerio Personal Firewall.  ZoneAlarm is a product of Zone Labs which has been popularly known as the producer of reliable products which are widely used. 

On the other hand, Sunbelt Kerio Personal Firewall normally provides free download of full functions which last for a maximum of 30 days.  After which, the features will go back to the free version.  PC owners may opt to maintain the full functions after 30 days but this will come already with a fee which is usually around $20. 

However, there are some things that you should remember when installing another firewall.  Make sure that the built-in firewall within Windows XP is deactivated already before installing another one.  It is not good to use two firewalls at the same time.  After installation of the new one, test it to see if your PC is really secured. 

There are still many other free PC security softwares available nowadays.  One is called Ad Blocker which works to filter out web bugs, cookies, and urls.  Anti-Rootkit, on the other hand, shuns off concealed applications and processes.

Moreover, to remove spyware on your PC, you may avail of Microsoft Anti-Spyware.  Another variation is called SpywareBlaster which prevents the loading of spyware onto your computer.

Some internet browsers may also pose some risks to PC security.  According to some, the use of Internet Explorer brings in some viruses to the PC.  Firefox may be a good alternative. 

Furthermore, for email clients, Thunderbird is also considered as a better option over Outlook Express.  A lot of users express satisfaction with such email client.

You can indeed choose from a wide variety of available free PC security softwares.  To help you find out the most suitable for you, lay down all your usual PC activities.  From there, you can see what exposes you to risk most and counter with the best alternative.