我们的一些读者要求我们测试在网上找到的最流行的免费防病毒扫描程序。由于此类扫描仪可用于提供良好的第二意见，而无需安装功能齐全的安全产品(security product)，我们认为评估此类产品是值得的。我们已经测试了 10 种最流行的在线安全扫描仪，尽管它花费了大量的工作，但我们现在有一些令人兴奋的结果要与您分享。不要犹豫，阅读这篇文章，找到关于适用于 Windows的最佳免费在线防病毒扫描程序：(online antivirus)
正在测试的在线防病毒(online antivirus)扫描程序
为了选择本次测试中包含的产品，我们使用了2016 年数字公民奖(Digital Citizen Awards 2016)的决赛选手- 年度最佳 Windows安全产品(security product)！对于所有供应商，我们搜索了他们是否也提供免费的在线安全扫描器(online security scanner)。不幸的是，并非所有人都这样做，而且在那些这样做的人中，并非所有人都是好人。
我们最终包含在此比较中的产品按字母顺序排列如下：Bitdefender QuickScan、Comodo Cloud Antivirus、ESET Online Scanner、F-Secure Online Scanner、Kaspersky Security Scan、McAfee Security Scan Plus、Norton Security Scan、Panda Cloud Cleaner和趋势科技上门服务(Trend Micro HouseCall)。
我们很快了解到，许多产品不再是您可以在Web 浏览器(web browser)中运行的经典在线扫描仪。大多数安全供应商现在都提供独立的防病毒(standalone antivirus)扫描程序，您需要下载并安装在您的计算机上。它们可以与您的其他安全产品一起运行，而不会引起冲突或性能问题。只要您需要它们，就可以使用它们为您提供有关系统安全状态(security status)的快速第二意见。
重要提示：(Important note:)此测试不包括任何成熟的安全产品(security product)。它是关于可用于扫描和评估系统安全性的免费工具。这些工具不能也不应该取代适当的安全解决方案，例如防病毒、反间谍软件和防火墙解决方案。它们应该仅用于补充真正的安全产品(security product)或帮助您识别您怀疑存在恶意软件问题的系统的问题。
这就是我们测试这些在线安全扫描仪的方式
首先，我们记录了每个产品的设计方式：它是真正的在线扫描仪(online scanner)、独立应用程序(standalone application)还是两者的混合体。在安装和/或运行每个免费的在线安全(online security)扫描程序之前，我们运行了几个恶意软件样本来感染我们的测试系统(test system)。然后，我们浏览了几个不可靠的网站，这些网站存储了您不希望在您的计算机上拥有的 cookie，或者它们试图在您的计算机上安装不同形式的不可靠工具栏或恶意软件。
一旦我们确定我们的系统上运行了一些恶意软件样本并存储了几个受感染的文件，我们就开始一个一个地使用每个防病毒扫描程序(antivirus scanner)。我们测试了他们扫描系统的速度，记录了他们检测到的恶意软件样本数量，提供了哪些信息以及他们提出的解决方案。扫描是在占用空间为 17GB 的 20GB 分区上进行的。我们使用的是Windows 10，禁用了Windows Defender，我们的测试系统(test system)上运行着正好 17 个恶意软件样本。
Bitdefender 快速扫描
Bitdefender QuickScan是少数真正的在线扫描仪之一。但是，您应该知道您不能从任何网络浏览器(web browser)运行它，因为仅支持Internet Explorer、Mozilla Firefox 和 Google Chrome(Mozilla Firefox and Google Chrome)。Bitdefender 的 QuickScan(Bitdefender's QuickScan)的优点是速度非常快：扫描计算机中的恶意软件只需不到一分钟。
不幸的是，Bitdefender QuickScan仅告知系统是否被感染，并共享第一个发现的活动病毒的名称。没有显示其他有用信息，您唯一的选择是下载并安装 3 个月的Bitdefender Internet Security试用版，以便您对系统进行消毒。
尽管此工具快速且轻松，但它并没有为用户提供太多价值。其他安全供应商提供了更好的替代方案。
Comodo 云杀毒软件
Comodo Cloud Antivirus是一种在线扫描程序(online scanner)，与许多其他扫描程序一样，它作为一个独立程序(standalone program)提供，您可以下载并安装在Windows 计算机上(Windows computer)。您会注意到的第一件事是，此扫描程序看起来更像是一个完整的防病毒解决方案(antivirus solution)，而不仅仅是一个注定只能随便使用的在线防病毒扫描程序。(antivirus scanner)它的用户界面提供了大量的设置和选项，它是我们测试过的为数不多的在线防病毒软件之一，可让您运行快速和完整的系统扫描以及自定义扫描。
我们使用Comodo Cloud Antivirus(Comodo Cloud Antivirus)运行的快速扫描不到 2 分钟，最终只检测到一个恶意软件样本(malware sample)。这不是一个很好的结果，但是在我们之后运行的完整系统扫描中它变得更好了。这一次，即使花费了 59 分钟，Comodo Cloud Antivirus也设法从我们放置在测试计算机(test computer)上的 17 个恶意软件样本中识别出 13 个恶意软件样本。
Comodo Cloud Antivirus是少数能够清除他们发现的恶意软件的防病毒扫描程序之一。这是值得赞赏的。
ESET 在线扫描仪
ESET Online Scanner是少数可用的非常好的在线防病毒(online antivirus)扫描程序之一。ESET Online Scanner可作为独立的Windows 应用程序(Windows app)提供，您可以下载并在计算机上运行。在执行扫描之前，ESET会自动将最新的签名下载到您的计算机，并允许您自定义它将运行的防病毒扫描。默认情况下，ESET Online Scanner设置为扫描您计算机上的所有内容：运行内存(Operating memory)、自动启动位置(Autostart locations)和本地驱动器(Local drives)。您还可以告诉ESET Online Scanner您是否希望它自动清除它发现的威胁，是否应该扫描存档内部，或者是否希望它扫描可能不需要的应用程序。
我们运行的完整系统扫描大约花费了 29 分钟，并识别了我们测试计算机(test computer)上的所有 17 个恶意软件样本。对于每个已识别的威胁，ESET Online Scanner会显示名称和文件的位置。我们赞赏，在防病毒扫描结束后，您可以将扫描仪设置为从您的计算机上卸载自己的文件。
ESET的安全产品以谨慎和非侵入性的方式进行推广。ESET Online Scanner提供了您对优秀(ESET Online Scanner)在线扫描仪(online scanner)的期望，我们对它的表现非常满意。
F-Secure 在线扫描仪
F-Secure Online Scanner是另一个您必须下载并在您的计算机上运行的独立程序。(standalone program)在进行扫描之前，它会自动下载最新的签名文件。
然后，F-Secure Online Scanner 会(F-Secure Online Scanner)自动开始扫描您的系统以查找恶意软件。您无法自定义任何内容，也无法选择要运行的防病毒扫描类型。一切都是自动的。
如果F-Secure Online Scanner发现受感染的文件，它将要求您重新启动计算机以便能够清除它们。如果需要，您还可以查看有关在您的计算机上发现恶意软件文件的详细信息、有多少文件感染了某种病毒，如果您真的很好奇，您还可以上网查看有关它的更多信息。
F-Secure Online Scanner是我们测试过的最快的防病毒扫描程序之一：扫描 20GB 分区只用了不到一分钟，它成功识别出我们在测试计算机(test computer)上运行的 17 个病毒中的 12 个恶意文件.
卡巴斯基安全扫描
Kaspersky Security Scan是另一种在线防病毒扫描(antivirus scanner)程序，它作为独立应用程序(standalone application)提供，您需要下载并在您的计算机上运行。用户界面简单易用，它可以让您执行快速或完整的系统扫描，甚至可以设置定期扫描的时间表。默认情况下，该工具每周扫描您的系统两次。不幸的是，您无法更改频率，尽管您可以更改它们在一周中的哪几天运行。
快速扫描在大约 2 分钟内完成，仅显示 2 个恶意软件样本。完整的系统扫描在 52 分钟内完成，并识别出 9 个恶意软件样本。
当显示结果时，它们分为几个部分：
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恶意软件(Malware)- 显示在扫描期间发现的所有受感染文件。
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系统保护(System protection)- 显示您的计算机上是否安装了活动的防病毒软件。
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其他问题(Other issues)- 显示如何配置 Windows Explorer 或 Internet Explorer 的问题。
一切都很好，但是，如果您想从系统中清除受感染的文件，或者如果您想纠正Kaspersky Security Scan发现的任何其他问题，您必须在线访问Kaspersky的网站并下载一个试用或购买(trial or purchase)他们的一种安全产品。
转到本文的下一页以了解有关其他安全产品的更多信息，以及我们对最佳在线防病毒扫描程序(online antivirus scanner)的最终判断。
Test comparison - Which is the best free online antivirus scanner?
Ѕome of our readers asked us to tеst the most popular free antiviruѕ scanners found online. Since such scаnners are useful in providing a good second opіnion, without having to install a fully-featured ѕecυrity produсt, we thought it is worthwhile to evaluate suсh products. We've tested the 10 most popυlar online security scanners and, although it took quite a bit of work, we now have some exciting reѕults to sharе with you. Don't hesitate to read thіs article and find which are about the best freе online аntivirus scanners for Windows:
The online antivirus scanners being tested
To choose the products included in this test, we used the finalists of our Digital Citizen Awards 2016 - The best Windows security product of the year!. For all the vendors, we searched to see if they also offer a free online security scanner. Unfortunately, not all of them do, and out of those who do, not all of them are good.
The products we ended up including in this comparison are, alphabetically ordered, the following: Bitdefender QuickScan , Comodo Cloud Antivirus , ESET Online Scanner , F-Secure Online Scanner , Kaspersky Security Scan , McAfee Security Scan Plus , Norton Security Scan , Panda Cloud Cleaner and Trend Micro HouseCall.
We quickly learned that many products are no longer classic online scanners which you can run in your web browser. The majority of security vendors now offer standalone antivirus scanners which you need to download and install on your computer. They can run alongside your other security products, without causing conflicts or performance issues. They can be used whenever you need them to provide you with a quick second opinion about your system's security status.
Important note: This test does not include any full fledged security product. It is about free tools that you can use to scan and evaluate the security of your system. These tools cannot and should not replace proper security solutions such as antivirus, antispyware and firewall solutions. They should be used only to complement a real security product or to help you identify what's wrong with a system which you suspect of having problems with malware.
This is how we tested these online security scanners
First, we recorded how each product is designed: if it is a true online scanner, a standalone application or a hybrid between the two. Before installing and/or running each of the free online security scanners, we ran several malware samples to infect our test system. Then, we browsed several dodgy websites that store cookies which you don't want to have on your computer, or which try to install different forms of dodgy toolbars or malware on your computer.
Once we were sure we had a few malware samples running on our system and several infected files being stored, we started using each antivirus scanner, one by one. We tested how fast they scanned the system, recorded how many malware samples they detected, what information was provided and the solutions they proposed. The scans were made on a 20GB partition with 17GB of occupied space. We used Windows 10, with Windows Defender disabled and there were exactly 17 malware samples running on our test system.
Bitdefender QuickScan
Bitdefender QuickScan is one of the few true online scanners. However, you should know that you can not run it from any web browser, as only Internet Explorer, Mozilla Firefox and Google Chrome are supported. The good thing about Bitdefender's QuickScan is that it's very fast: it took less than a minute for it to scan the computer for malware .
Unfortunately though, Bitdefender QuickScan only tells if the system is infected or not and shares the name of the first virus found active. There's no other useful information being displayed and the only option you have is to download and install a 3 months trial of Bitdefender Internet Security , so that you can disinfect your system.
While this tool is quick and painless, it doesn't provide much value to its users. There are better alternatives provided by other security vendors.
Comodo Cloud Antivirus
Comodo Cloud Antivirus is an online scanner which, like many others, comes as a standalone program that you download and install on your Windows computer. The first thing that you will notice is the fact that this scanner looks more like a full antivirus solution than just an online antivirus scanner destined to be used only casually. Its user interface offers plenty of settings and options and it's one of the few online antiviruses that we've tested which lets you run both quick and full system scans, as well as custom scans.
The quick scan we ran with Comodo Cloud Antivirus took less than 2 minutes and ended up with only one malware sample detected. This is not a very good result, but it got better in the full system scan we ran afterwards. This time, even if it took 59 minutes for it to do so, Comodo Cloud Antivirus managed to identify 13 malware samples out of the 17 we placed on the test computer.
Comodo Cloud Antivirus is one of the few antivirus scanners that are also able to clean the malware they find. And this is something worth appreciating.
ESET Online Scanner
ESET Online Scanner is one of the few very good online antivirus scanners available. ESET Online Scanner is available as a standalone Windows app that you download and run on your computer. B efore a scan is performed, ESET automatically downloads the latest signatures to your computer and it lets you customize the antivirus scan it will run. By default, ESET Online Scanner is set to scan everything on your computer: the Operating memory , the Autostart locations and the Local drives. You can also tell ESET Online Scanner whether you want it to automatically clean the threats it finds, if it should scan inside archives or not, or if you want it to scan for potentially unwanted applications.
The full system scan we ran took about 29 minutes and identified all the 17 malware samples we had on our test computer. For each identified threat, ESET Online Scanner displayed the name and the file's location. We appreciated that, after the antivirus scan ends, you can set the scanner to uninstall its own files from your computer.
ESET's security products are promoted in a discreet and non-intrusive way. ESET Online Scanner offers what you would expect from a good online scanner and we are very happy with how it performed.
F-Secure Online Scanner
F-Secure Online Scanner is another standalone program which you must download and run on your computer . Before a scan is made, it automatically downloads the latest signature files.
Then, F-Secure Online Scanner automatically starts scanning your system for malware. You can't customize anything and you can't choose what type of antivirus scan you want to run. All is automatic.
If F-Secure Online Scanner finds infected files, it will ask you to restart your computer in order for it to be able to clean them. If you want, you can also see the details about where malware files were found on your computer, how many files are infected with a certain virus and, if you're really curious, you can also go online and see more information about it.
F-Secure Online Scanner was one of the fastest antivirus scanners we've tested: it took it less than a minute to scan the 20GB partition and it managed to identify 12 malicious files, out of the 17 viruses we had running on the test computer.
Kaspersky Security Scan
Kaspersky Security Scan is another online antivirus scanner that comes as a standalone application, which you need to download and run on your computer. The user interface is simple and easy to use, and it lets you perform a quick or a full system scan and even set a schedule for regular scans. By default, the tool scans your system twice a week. Unfortunately, you cannot change the frequency, although you can change the days of the week in which they are run.
A quick scan finished in about 2 minutes and revealed only 2 malware samples. A full system scan finished in 52 minutes and identified 9 malware samples.
When presented with the results, they are split into several sections:
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Malware - shows all the infected files that were discovered during the scan.
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System protection - shows whether you have an active antivirus installed on your computer.
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Other issues - displays issues with how Windows Explorer or Internet Explorer are configured.
Everything is fine and dandy but, if you want to clean the infected files from your system, or if you want to correct any of the other issues found by Kaspersky Security Scan , you will have to go online to Kaspersky's website and download a trial or purchase one of their security products.
Go to the next page of this article to learn more about other security products, as well as our final verdict about the best online antivirus scanner.
