bitdefender不是世界第一的杀毒软件，它只是在国外的一个TOP排行榜被列为第一，但是那个排行榜的机构是商品评测机构，而不是病毒测试机构。当然，这并不是质疑它的水平的理由。
但是，病毒测试机构发布排行榜时，都有附带的测试报告，TOP排行榜是没有的，起码我没有看到。
而且在杀毒软件论坛，一般是不认可这个排行榜的，如果有人不知道，可以去几个著名的杀毒软件论坛看看。
而且，国外的著名排行榜至少还有3、4个，排行是不一样的。
没有权威说法说TOP比其它排行榜更权威，所以bitdefender不能说是世界第一。

楼主你么？你上过TOPTEN没？人家查杀数据来自权威的VB100和av-c还有其它测试机构！都是满意的5星级查杀效能在4.5这么个满意度！另外中国是个不开化的民族，看他的思维能力非常狭窄，防毒软件不仅要杀毒，还要有额外的安全保障。外国人不会在意那几个百分之几的偏差，倒是很在意其它安全保障，如在线的身份保证反钓鱼，邮箱保护等等防护数据泄露等，另外聊天加密防数据盗窃或窃听等等，外国人安全意识很强也很有钱所以人们会选在功能强大全面地软件有时候会有在线数据备份或保险箱等。bitdefender反病毒版本综合能力强大而第一的，怎么不是世界第一？你眼睛瞎喇嘛？
至于评测杀毒率毫无意义，现在水平就是这么个病毒特征吗，在新的恶意软件绝大多数软件拦截率低于40%，所以功能健全的保护重要的。另外说下eset nod32这种破烂货在欧洲很少有人用，老实说eset功能单薄的软件不被看好在实际应用中！ 

Ease of Installation:  
BitDefender Antivirus installation is extremely simple and pretty intuitive. Whether you’ve purchased a box copy or are installing the software from an electronic download, the process is straightforward and easy. After a few quick downloads and a few approvals, you’ll be up and running (or letting BitDefender work automatically for you if you desire) in no time.
For the most effective protection, BitDefender removes other antivirus software you may have running that could potentially interfere.
As part of the installation process you will choose from three user profiles, or user levels. But don’t worry if you change your mind (or simply want to see the unique interface layout associate with each). You can easily change what mode you’re in by accessing the settings menu.
Ease of Use:  
BitDefender Antivirus 2010 is certainly easy to use. This year BitDefender adds user profiles, allowing the end user to choose the level of control they want from the program, and choosing from three distinct interface choices specifically designed to accommodate their specific needs and activities. You can choose from novice, intermediate, or advanced.
The novice mode is perfect for anyone who simply wants to install security software, forget about it, and never have to worry about being completely protected. While the beginner will be given access to some basic features, most of the advanced settings are pre-set for optimum security, allowing the user to let BitDefender do all the “hard work” for them. Computer security couldn’t be easier.
The intermediate user interface definitely has more options and utility, but is effectively organized and easy to use. The intuitive tab interface makes it completely easy to navigate, and includes a simple dashboard and access to each of the major utilities.
The advanced expert interface gives the user complete access to all the tools and features, and while it’s more complex, it is just as intuitively organized and easy to navigate.
Features:  
BitDefender Antivirus has a complete lineup of all the essential features (and then some). The antivirus software is equipped to protect your computer from a number of threats, and provides complete peace of mind while downloading files online, opening emails, or sending an important IM.
Along with the Active Virus Control features, the 2010 edition of BitDefender includes advanced Intrusion Detection technology. BitDefender will warn you if it detects any direct code injection (DLL) attacks, and proactively detects and defends from malicious attempts to adjust your crucial registry entries or system files.
Another advanced feature is one sure to please PC gamers. Bitdefender features a no-interruptions gamer mode that is ideal for stopping annoying notices or popups from interfering while you’re in the middle of some intense gaming (or a full-screen video, or presentation).
BitDefender 2010 is also equipped to run effectively on laptops, and features a special laptop mode designed to optimize battery life. (Of course you may also be interested in BitDefender Total Security for Mini-Notebooks, a comprehensive security/utilities/backup solution specifically designed to run well on netbooks)


Updates:  
With today’s virtual world constantly being introduced to more (and more advanced) threats, antivirus software is only as good as its latest update. Timely updates to virus databases and definition files are crucial in keeping you protected. The main kernel-level antivirus protection of BitDefender depends on an up-to-date list of known virus signatures and matching code.
BitDefender Antivirus 2010 performs regular updates every hour (unless directed otherwise by the user). BitDefender is setup to run these crucial updates automatically, and they are run in the background. You don’t have to worry about manually updating (though you can if you want), and more importantly, you don’t have to worry about updates slowing down your system.
Furthermore, you don’t have to worry about updates causing problems or losing program files. If file damage does occur (rare), BitDefender is setup to automatically repair itself with the newest working update.
Help & Support:  
BitDefender is amazingly easy to use, and does most of the work for you so you don’t have to tweak it and constantly interact with the program (read: there are fewer annoying popups than other software). But if you need additional assistance or product support, you don’t have to go very far.
BitDefender 2010 now has in-product technical support, providing answers to some of the most common questions. The self-service module also gives you the ability to contact the technical support team directly from the product itself.
Softwin, the manufacturer of BitDefender offers a robust set of helpful resources online, and free 24/7 support. You can access the BitDefender security support team via phone, email, or even online chat.
Summary:
BitDefender Antivirus 2010 is certainly one of the best security software solutions available, combining powerful features and excellent protection in an easy to use program. The software is effective, simple, and impressively priced.
Overall, you can’t go wrong with BitDefender Antivirus 2010 when it comes to virus protection, versatility, and value. For superior performance, protection, and price, we recommend BitDefender Antivirus 2010.
Alternatively, you may be interested in BitDefender Internet Security for additional protection with antispam and a firewall. Or you might look into BitDefender Total Security, the all-in-one premium suite that includes security, parental controls, tune-up utilities, and online backup.


个人认为BD的杀毒能力还是比较强的。其实争那个第一没啥意思，这东西本身就没法给个令所有人信服的答案，总不能把所有的威胁都拿来测试吧。