Some free antivirus Programs for home use

Avast is one good antivirus program for home use .Of course you will have to register for continued use but is free for home use. You can download avast from it.s website here.
Avg is another antivirus program but the newer version is recommended for computers with higher configuration.
other ones are

Mcafee anti virus.
Norton anti virus.
avira antivir.
Pc tools antivirus etc.