Meskipun antivirus gratis mempunyai fitur yang lebih sedikit di banding antivirus berbayar, tetapi tidak semua bisa dianggap remeh. Bahkan dengan rutin update dan menambah program keamanan yang tepat, terkadang hal itu sudah cukup untuk keamanan komputer kita.
Berikut daftar (referensi) Antivirus-antivirus gratis ( non lokal ) disertai dengan informasi tempat/lokasi download-nya.

Disini tidak akan dibahas lengkap mengenai masing-masing produk Antivirus, tetapi hanya menyediakan daftar lengkap free antivirus (harapannya menjadi daftar terlengkap), link informasi detail antivirus, lokasi download, Sistem operasi yang didukung/diperlukan, ukuran file istallasi dan link manual update jika tersedia.

1. Avira Antivir Personal Free Antivirus

URL : http://www.free-av.com/
Download :
- http://dlce.antivir.com/package/wks_avira/win32/en/pecl/avira_antivir_personal_en.exe
- http://dlce.antivir.com/package/wks_avira/win32/en/pecl/avira_antivir_personal_en.zip
- http://www.softpedia.com/progDownload/AntiVir-Personal-Edition-Download-6527.html
- http://download.cnet.com/Avira-AntiVir-Personal-Free-Antivirus/3000-2239_4-10322935.html
- http://www.filehippo.com/download_antivir/
Ukuran : 28.61 MB (exe), 31.11 MB (Zip)
Platform/Sistem : Windows 2000/XP/Vista ( 32/64 Bit)
Manual Update :
- http://dl.antivir.de/down/vdf/ivdf_fusebundle_nt_en.zip
- http://dl1.avgate.net/down/vdf/ivdf_fusebundle_nt_en.zip
- http://dl2.avgate.net/down/vdf/ivdf_fusebundle_nt_en.zip

2. AVG Free Antivirus

URL : http://free.avg.com/download-avg-anti-virus-free-edition
Download :
- http://www.avg.com/filedir/inst/avg_free_stf_en_85_285a1462.exe
- http://download.cnet.com/AVG-Anti-Virus-Free-Edition/3000-2239_4-10320142.html
- http://www.softpedia.com/get/Antivirus/AVG-Free-Edition.shtml
- http://www.filehippo.com/download_avg_antivirus/
Ukuran : 60.1 MB
Platform/Sistem : Windows 2000 SP4 + SRP1, XP Home/Prof SP2 dan Windows Vista
Manual Update : http://free.avg.com/download?prd=afe#tba4

3. Avast! Home Edition

URL : http://www.avast.com/eng/download-avast-home.html
Download :
- http://files.avast.com/iavs4pro/setupeng.exe
- http://download.cnet.com/Avast-Home-Edition/3000-2239_4-10019223.html
- http://www.softpedia.com/get/Antivirus/Avast-Home-Edition.shtml
- http://www.filehippo.com/download_avast_antivirus/
Ukuran : 31.27MB
Platform/Sistem : Windows 95/98/Me/NT 4/2000/XP/Vista ( 32/64 bit )
Manual Update link : http://files.avast.com/iavs4pro/vpsupd.exe ( ~ 23 MB )

4. BitDefender Free Antivirus

URL : http://www.bitdefender.com/PRODUCT-14-en–BitDefender-Free-Edition.html
Download :
- http://www.bitdefender.com/site/Downloads/browseEvaluationVersion/1/42/
- http://www.softpedia.com/get/Antivirus/BitDefender-Free-Edition.shtml
- http://www.filehippo.com/download_bitdefender/
Ukuran : 21.08MB
Platform/Sistem : Windows 98/NT-SP6/Me/2000/XP IE 4.0(+)
Manual Update : -

5. PC Tools AntiVirus Free Edition

URL : http://www.pctools.com/free-antivirus/
Download link :
- http://www.pctools.com/free-antivirus/download/
- http://download.cnet.com/PC-Tools-AntiVirus-Free-Edition/3000-2239_4-10625067.html
Ukuran : 43.7 MB
Platform/Sistem : Windows® Vista™ 32-bit, XP dan 2000
Manual Update : -

6. Comodo Internet Security (Firewall + Antivirus)

URL : http://personalfirewall.comodo.com/index.html
Download :
- http://personalfirewall.comodo.com/download_firewall.html
- http://download.cnet.com/Comodo-Internet-Security/3000-10435_4-10907041.html
Ukuran : 45.2 MB ( versi 3.8) / 27.29 MB ( versi 3.5)
Platform/Sistem : Windows XP (SP2), Windows Vista ( 32/ 64 bit )
Manual Update : -

7. Rising Antivirus Free Edition

URL : http://www.freerav.com/
Download :
- http://down.rising-global.com/for_down/09globalver/RavINTFree.exe
- http://download.cnet.com/Rising-Antivirus-2009-Free-Edition/3000-2239_4-10674783.html
- http://www.softpedia.com/get/Antivirus/Rising-Antivirus-Free-Edition.shtml
Ukuran : 60.92MB
Platform/Sistem : Windows 98/Me/NT/2000/XP/2003/Vista
Manual Update : -

8. ClamAV Antivirus

URL : http://www.clamav.net/
Download :
- http://www.softpedia.com/progDownload/ClamAV-Download-13391.html ( Windows )
- http://www.clamav.net/download/
Ukuran : 3.76 MB ( Untuk Windows )
Platform : Linux, BSD, AIX, OSF, Solaris, HP-UX,OpenVMS, Win32 (Windows 9x/ME/2000/XP/Vista)
Manual Update : http://www.clamav.net/download/cvd

9. ClamWin Free Antivirus

URL : http://www.clamwin.com/
Download Link :
- http://www.clamwin.com/content/view/18/46/
- http://www.filehippo.com/download_clamwin/
Ukuran : 24.5 MB
Platform/Sistem : Microsoft Windows 98/Me/2000/XP/2003 dan Vista
Manual Update : http://www.clamav.net/download/cvd

10. CS Anti-Virus

URL : http://www.creasoftware.net/prodotto.asp?id=16
Download link :
- http://www.creasoftware.net/download.asp?id=37
- http://www.softpedia.com/get/Antivirus/CS-Anti-Virus.shtml
Ukuran : 4.6 MB ( Update ~ 20 MB )
Platform/Sistem : Windows NT/2000/XP/2003/Vista
Manual Update : http://clamav.mirror.garr.it/main.cvd

11. My Free Antivirus

URL : http://smartpctools.com/free_antivirus/index1.html
Download :
- http://www.smartpctools.com/files/antivirussetup.exe
- http://www.softpedia.com/get/Antivirus/My-Free-Antivirus.shtml
Ukuran : 6.2 Mb
Platform/Sistem : Windows NT/2000/XP/2003/Vista
Manual Update : -

12. ThreatFire AntiVirus Free Edition

URL : http://www.threatfire.com
Download :
- http://www.threatfire.com/files/tfinstall.exe
- http://download.cnet.com/ThreatFire-AntiVirus-Free-Edition/3000-2239_4-10726873.html
Ukuran : 7.81 MB
Platform/Sistem : Windows® Vista™, XP, 2000 dan 2003
Manual Update : -
Daftar diatas adalah antivirus yang menyertakan real time protection (jadi tools/utility/antivirus yang hanya menyediakan scan virus/repair saja tidak disertakan). Artikel tentang antivirus selanjutnya insyaAllah akan membahas tentang tool-tool gratis yang bisa digunakan untuk langsung melakukan scan komputer, terutama yang sudah terkena virus.