Virus Removal Tool

Personally, I use a combination of AdAware Pro and MalwareBytes. Firefox as a browser also does a GREAT job at keeping the viruses away. The only time I get viruses is when my little brother decides to steal the computer, and I know the gross sites he visits…

(Also, you could just get a five-finger discount by pirating AdAware, it’s pretty easy to do, but you didn’t hear that from me!)

http://www.av-comparatives.org/images/stories/test/ondret/avc_report23.pdf

Check the review.. Shows you the best one.

Paid-for? ESET NOD32 is very good – it is fast, light and effective (has one of the smallest footprints known for an AV). Norton isn’t too bad – the latest versions have improved considerably. Suite-wise? Kaspersky Internet Security 2010 is a good choice – it includes a decent firewall for a suite.

Free? Avast! Home Edition is one of the better ones – it includes pretty much everything a commercial AV does. However, if you are willing to pay, you are better off going for a top-rated commercial AV.

While some claim that AntiVir Personal is "the best" or "even better than paid software" … it is not. For starters, it lacks a web shield (also known as the AntiVir ‘WebGuard’ and ‘AntiDrive-by’). And secondly, it is known to suffer update problems. I do not consider an incomplete AV that can’t update correctly, "the best."

Microsoft has released version 1.0 of Security Essentials, the successor to Live OneCare. Originally known as Morro, Security Essentials retains the core features of OneCare, but abandons the additional heft of a firewall, performance tuning, and backup and restore options in exchange for making the program free. Rather than taking aim at full-featured security suites made by Symantec or Eset, the features available in Security Essentials indicate that Microsoft is aiming to compete with basic-but-free security appsIt uses both definition file and real-time defenses against viruses and spyware, and also offers rootkit protection.Security Essentials benefits greatly from having a simple, streamlined interface. There are four tabs, each with a concise and understandable label: Home, Update, History, and Settings. The program also uses easy-to-grasp labels, imported from OneCare: green for all good, yellow for warning, and red for an at-risk situation.
From the Home window, you can run a Quick Scan, Full Scan, or Custom Scan, and a link at the bottom of the pane lets you change the scheduled scan. The Custom Scan lets users select specific folders or drives to scan, but it doesn’t allow for customizing the type of scan used. For example, you’re not going to be able to choose to scan only for rootkits or heuristics, as you can with other security programs. The program installs a context-menu option for on-the-fly scanning in Windows Explorer, too.
The Update pane manages the definition file updates, with a large action button, and History provides access to a spreadsheet-style list of All detection items, your Quarantine, and items you’ve Allowed to run. Although it’s a basic layout, this no-frills approach to security could prove appealing to computer users who are overwhelmed by more detailed security choices.Security Essentials comes pre-configured to run a scan weekly at two in the morning, when your Microsoft thinks your system is likely to be idle. New malware signatures are downloaded once per day by default, although you can manually instigate a definition file update through the update tab. Attachments and downloaded files will be automatically scanned by Security Essentials.I found that it installed in less than one minute, and completed its first Quick Scan in less than 30 seconds.While running the Full Scan, I noticed that it took up about 86 MB of RAM. However, it felt far lighter, and I was able to perform resource-intensive tasks like uploading photos without any noticeable freezes.

Conclusion
Microsoft Security Essentials is a lightweight security app that people might turn to for a number of key reasons. It’s easy on the system resources, it’s easy to figure out how to use, and it comes pre-configured. It only works on legally licensed Microsoft computers, which is understandable but potentially leaves a large segment of the unprotected population still unprotected.
To download go to http://www.microsoft.com/security_essent…

The download is free!!!!

To buy Nod 32 Antivirus lightweight low RAM use ,excellent proactive detection low false positives and user friendly .
http://www.vistax64.com/system-security/204556-antivirus-program-low-ram-cpu-usage.html
Best free Microsoft Security Essentials also lightweight low RAM use,excellent proactive detection low false positives user friendly
http://www.pcworld.com/article/173023/microsofts_free_av_looks_good_in_new_test_results.html