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FREE Antivirus that works

Posted in Tips n Tricks, Windows


List of free antivirus that eats up less system resources.

The results are arranged from the lowest memory usage while idle to the most memory usage.

1. PC Tools AntiVirus Free Edition 4.0.0.26 (freeware)

Total memory usage during idle: 5680K
Total memory usage during scanning: 23948K
Cannot detect private trojan

Link: http://www.pctools.com/free-antivirus/

2. Kaspersky Antivirus 2009 v8.0.0.357 (shareware)

Total memory usage during idle: 6565K
Total memory usage during scanning: 50892K
Detects private trojan through heuristic method, not through virus definition
Link: http://www.kaspersky.com/kaspersky_anti-virus

3. Spyware Terminator v2.2.3.444 (freeware)

Total memory usage during idle: 7624K
Total memory usage during scanning: 64292K
Unable to detect virus with the built-in antivirus. However when tried to run the trojan, HIPS picks it up as a threat
Uses ClamAV for antivirus protection
Link: http://www.spywareterminator.com/

4. Norton AntiVirus 2008 (shareware)

Total memory usage during idle: 8424K
Total memory usage during scanning: 78008K
Cannot detect private trojan

Link: http://www.symantec.com/norton/antivirus

5. BitDefender 10 Free Edition (freeware)

Total memory usage during idle: 9668K
Total memory usage during scanning: 42492K
Cannot detect private trojan
Link: http://download.bitdefender.com/windows/desktop/free/final/en/bitdefender_free_v10.exe

6. Avira AntiVir Personal 8 (freeware)

Total memory usage during idle: 10072K
Total memory usage during scanning: 70072K
Detects private trojan through heuristic method, not through virus definition
Link: http://www.free-av.com/

7. Kaspersky Internet Security 2009 v8.0.0.3578 (shareware)

Total memory usage during idle: 16180K
Total memory usage during scanning: 44216K
Detects private trojan through heuristic method, not through virus definition
Link: http://www.kaspersky.com/kaspersky_internet_security

8. Rising Antivirus 20.44 (freeware)

Total memory usage during idle: 16252K
Total memory usage during scanning: 59704K
Cannot detect private trojan through virus definition but blocks it from executing
Link: http://www.freerav.com/

9. DriveSentry 3.1 (freeware)

Total memory usage during idle: 16992K
Total memory usage during scanning: 18504K
Cannot detect private trojan
Link: http://www.drivesentry.com/

10. avast! 4 Home Edition (freeware)

Total memory usage during idle: 23100K
Total memory usage during scanning: 63416K
Cannot detect private trojan
Link: http://www.avast.com/eng/avast_4_home.html

11. CA Anti-Virus 2008 (shareware)

Total memory usage during idle: 37756K
Total memory usage during scanning: 47556K
Cannot detect private trojan
Link: http://shop.ca.com/virus/antivirus.aspx

12. AVG Anti-Virus Free Edition 8.0.138 (freeware)

Total memory usage during idle: 38244K
Total memory usage during scanning: 88244K
Detects private trojan through virus definition. Maybe they got a sample of the private trojan and added the detection to its virus definition
Link: http://free.avg.com/

13. ESET NOD32 Antivirus 3.0.669 (shareware)

Total memory usage during idle: 40364K
Total memory usage during scanning: 46012K
Cannot detect private trojan

Link: http://www.eset.com/products/nod32.php

14. ESET Smart Security 3.0.669 (shareware)

Total memory usage during idle: 42640K
Total memory usage during scanning: 39284K
Cannot detect private trojan
Link: http://www.eset.com/smartsecurity/

15. Trend Micro AntiVirus plus AntiSpyware 2008 (shareware)

Total memory usage during idle: 42608K
Total memory usage during scanning: 63704K
Able to detect private trojan as suspicious activity and blocked it from executing
Link: http://apac.trendmicro.com/apac/products/personal/antivirus-plus-anti-spyware/

16. ZoneAlarm Antivirus 7.0.483 (shareware)

Total memory usage during idle: 52772K
Total memory usage during scanning: 97200K
Cannot detect private trojan
Link: http://www.zonealarm.com/store/content/catalog/products/zonealarm_antivirus.jsp

17. BitDefender Antivirus 2008 v11 (shareware)

Total memory usage during idle: 56440K
Total memory usage during scanning: 73720K
Able to detect private trojan as threat
The free version uses BitDefender v10 and the shareware version uses the latest v11. So I had to make a comparison on both BitDefender products.
Link: http://www.bitdefender.com/PRODUCT-2194-en


Please check the downloaded file for Copyrights,Usage Info and Notes from the original Author.

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