There are free anti-malware apps available on the markets if you feel you need one. I'm using Lookout on mine with no apparent performance issues.
https://market.android.com/details?...result#?t=W251bGwsMSwyLDEsImNvbS5sb29rb3V0Il0.
http://www.amazon.com/Lookout-Mobil...1?ie=UTF8&s=mobile-apps&qid=1322563827&sr=1-1
Antivirus pro ... it works great i put it on all my android devices, phone/tablet... i can send y the apk. For the pro version..just send me an email and ill send it to u....