wikipedia
List of antivirus software
wikipedia
Some freeware:
avast! Free Antivirus
Avira Antivir (freeware)
Recognition and performance are the key factors when it comes to virus protection Wed, 15 July 2009
In a survey, IT security specialist Avira looked at the criteria users apply when choosing their virus protection and identified a well-developed awareness of brands and performance
Read more
PC-WELT readers agree: Avira is the “Brand of the Year 2009” Tue, 07 July 2009
Avira has come out on top in the Security Software product category of the "Brand Awareness International 2009" study.
Read more
AVG Antivirus Free Edition
Microsoft Security Essentials
Panda Cloud Antivirus, and their forum might you want to know more.
About Windows Defender
Just a few harmless programs Defender may detect as "This program has potentially unwanted behavior" which you can ignore of course:
FP_AX_CAB_INSTALLER.exe - Adobe® Flash® Player ActiveX Installer.
RivaTuner64.sys and RivaTunerWrapper.exe are the RivaTuner startup autoprofile
Al6licensing.exe - Creative ALchemy AL6 Licensing Service
InetRegEXE - Creative Product Registration from Creative Technology Ltd
ctxfihlp.exe - Creative X-Fi Helper
CtxfiReg - Creative X-Fi registration
CTAudSvc.exe - Creative Audioservice
CTAELicensing.exe - Creative Audio Engine Licensing Service
CTPBSeq.exe - Creative Post Boot Sequencer
readreg.exe - ReadReg belonging to ReadReg Application from Creative Technology Limited
CTASIO.DLL - module belonging to ASIO (Audio Stream In/Out) drivers
AudDrvEm.dll - audio driver emulator
VolPanlu.exe - Creative soundcard Volume Panel
CLIStart.exe - Catalyst Control Centre or ATI Catalyst Control Center or ACE or cli.exe or cli.exe
How to Create a Microsoft Security Essentials "Settings" Shortcut sevenforums.com