个人觉得a-squared Free不错，库很大,与收费版相比只是少了实时监控和些个别功能。
Last a-squared update:
Today, 1:59 PM
Version: 3.0.0.365
Number of Malware signatures:
Trojans 540711
Dialer 48384
Worms 80825
Spyware 38035
Traces 155223
Clean your PC with a-squared Free
- Remove infections of Trojans, Spyware, Adware, Worms, Keyloggers, Rootkits, Dialers and other malicious programs.
- 4 million users world wide rely on a-squared to clean their PC from Malware.
- Remarkable easy to use and completely free or charge.
a-squared removes reliably:
* Trojans, Backdoors, Keyloggers, Rootkits
Trojans and Backdoors provide strangers with access to your PC. Once a Backdoor is installed, an attacker can take full control of your computer. A Trojan is best described as a piece of software pretending to be something it is not - they often contain Backdoors, and usually arrive as email attachments. A Keylogger is a type of Malware that invisibly records all keyboard activity, whereas Rootkits hide on your PC and manipulate internal system operations. a-squared Free specializes in recognizing and eliminating these types of Malware.
More about Trojans
* Spyware, Adware, TrackingCookies
Your personal data and information is worth a great deal of money to certain advertising companies. They have no qualms about smuggling software into your system, recording information and spying on everything you do. Adverts that change the start page of your browser also belong in the Spyware/Adware category. a-squared Free completely removes Spyware from your PC. Traces of Spyware in the Registry and Tracking Cookies are also recognized.
More about Spyware
* Worms, Bots
Worm viruses are currently one of the most irritating phenomena on the Internet. Usually transmitted as dangerous email attachments, worms send copies of themselves to all reachable destinations and cause great damage. Newer network worms/bots use security holes (Exploits) to infect a PC, and can reproduce at an astonishing speed. Without your knowledge, your PC is essentially transformed into a spam-sending zombie! a-squared Free eliminates worms from your PC and prevents them from doing any further damage.
More about Worms
* Dialers
Dialers are small programs that change the Internet access number of a modem-equipped computer to a much more expensive number. Costs can rise as high as several hundred dollars per dial attempt. a-squared Free removes Dialers before they are becoming active.
More about Dialers
在download.com 的评价也相当高：
A-Squared 3   a2 免费版
AVG Anti-Spyware 7.5.0.50
两者基本在一个水平，因为都有免费版可用，所以样本收集起来要比没有免费版的要多得多，（本人还多次给它送过样本），查杀能力自然就强啦！如果用过 a2 免费版就知道它的更新很频繁，不但库，而且引擎还频频更新，说明官方还在加紧研发，并且它还是多语言，用起来很方便。 |
发表于 2007-9-2 00:58:43
发表于 2007-9-2 01:04:40
楼主
