If you don't have money to Buy a Comodo Internet Security which cost 69.99$, you can request Comodo and can get a Free Full version license of Comodo Internet Security. Remember the request must be genuine.
Comodo Internet Security features
Firewall
Defense+ Technology
Auto Sandbox Technology
Minimal Interruptions
TrustConnect
Online Backup
Remote Security & Anytime System Support
Virus-Free Guarantee - If a PC that has Comodo Internet Security Complete installed becomes infected with a virus or malware and cannot be restored to working condition by our support team, we will cover the cost of repair by a Comodo certified service up to $500.
Identity Protection Coverage
Compatibility - With Windows XP, Vista and 7 32 and 64 bit.
Read more about the product here
To request a license go to the Comodo Forum here and request for a license
if you are a school that can't afford security, or charity, or an organisation doing good work for the community, pls feel free to PM the Member who started that post (Melih).
[Via Otrivin]