Quote Originally Posted by n5110 View Post
can you suggest any free antivirus which best run on netbook given the slow processing power.
Assuming you bought your netbook with a genuine Windows license, MS Security Essentials is a free download. It's pretty light on the desktop as well. It's available from Windows XP up to Windows 7.

Between MSE and Spybot: Search and Destroy in Resident Mode, they should provide sufficient security.