The AV-TEST Institute is a leading international and independent service provider in the fields of IT security and anti-virus research. It is one of the most respected antivirus testing labs in the world.
(Click on your AV Program in the list for a Full Report):
Windows Test Results:   http://www.av-test.org/en/tests/test-reports/sepoct-2011/

See tests for Free Android operating system Anti-Virus programs:
www.av-test.org/fileadmin/pdf/avtest_2011-11_free_android_virus_scanner_english.pdf

The best free program was " Zoner AntiVirus Free " http://www.zonerantivirus.com

These commercial Android AV apps were rated superior to the free Mobile AV's;
F-Secure Mobile Security: http://www.f-secure.com/en/web/home_global/protection/mobile-security/overview

Kaspersky Mobile Security: http://www.kaspersky.com/kaspersky_mobile_security

CNET Article on AV-TEST of Android AV tests:
http://news.cnet.com/8301-1009_3-57325078-83/free-android-antivirus-apps-fail-to-cut-it/?tag=mncol;txt

Free Anti-Theft for Mobile - Helps get your lost or stolen phone back !
http://www.f-secure.com/en/web/home_global/protection/anti-theft-for-mobile/overview

Checkout past FREE Anti-Virus & Firewall listings on our website;
http://www.wnycomsoc.org/community/index.php/topic,1112.0.html