Computer anti virus?

I am an option 2 bt yahoo user were is my anti virus program security centre : cannot find virus program why ?

Computer anti virus?anti virus scan

becase your computer don,t have any anti virus just instal any anti virus on your computer

Computer anti virus?ariel

Here you can find som free antivirus programs

http://free.grisoft.com/doc/1

http://www.free-av.com/

http://www.avast.com/eng/avast_4_home.ht...
check the start menu
See it in the start menu or in " Program Files ".
Is my yahoo anti virus in opoeration?