大多数计算机（PC 或Mac ）都已经安装了某种防病毒软件。^{(antivirus software)}也许它是Windows Defender或其他东西。但是没有防病毒软件可以捕获所有内容。

如果您怀疑您的计算机发生了一些奇怪的事情，请尝试这些免费的在线病毒扫描和删除站点之一。

什么是在线病毒扫描和删除站点？^{(What Is An Online Virus Scan & Removal Site?)}

在线病毒扫描听起来像是一个会扫描您的计算机的网站。这曾经是可能的。现在，大多数网络浏览器都在其沙箱^(sandbox)中运行，以防止网站访问您计算机的其他部分。

在线病毒扫描程序和清除程序是一个可下载的小程序，它不像常规程序那样安装。它是一个像便携式应用程序^{(portable app)}一样运行的可执行文件。该应用程序可能会与应用程序制造商的站点通信以获取病毒定义^{(get virus definitions)}或将结果发送到其服务器进行分析。扫描完成后，您可以轻松删除该程序。

为什么要使用在线病毒扫描程序？^{(Why Use An Online Virus Scanner?)}

把它想象成从不同的医生那里得到第二意见。医生很聪明，但他们会犯错误。病毒扫描程序也是如此。另外，它们是免费的。如果你不付钱，为什么不使用它？

ESET 的免费在线扫描仪^{(ESET’s Free Online Scanner)(ESET’s Free Online Scanner)}

ESET 的免费在线扫描程序是一个可下载的可执行文件。扫描程序每次运行时都会回调 ESET 的服务器以获取新的病毒定义。 

特征：

• 三级扫描：完整^(Full)、快速^(Quick)和自定义^(Custom)
• 可设置警报、隔离或不隔离疑似病毒
• 如果不删除可执行文件，可以设置为每月进行一次病毒扫描。^{(monthly virus scans)}

F-Secure 免费在线扫描仪^{(F-Secure Free Online Scanner)(F-Secure Free Online Scanner)}

F-Secure 是防病毒领域的另一个知名名称。他们的免费在线扫描仪就像 1-2-3 一样简单。单击^(Click)他们网站上的立即运行^{(Run Now )}按钮，运行下载的可执行文件，该应用程序将扫描并删除它发现的任何病毒。就是这样。 

在该过程结束时，有一个链接可以下载他们的免费可安装防病毒应用程序^{(free installable antivirus app)}，但您不必这样做。如果您希望将其从计算机中删除，请删除该可执行文件。

特征：

• 简单的病毒扫描和清除
• 快速扫描

熊猫清云器^{(Panda Cloud Cleaner)(Panda Cloud Cleaner)}

不要让可爱的名字欺骗你。Panda是一款严肃的在线病毒扫描工具。这个名字在 IT 专业圈子之外可能并不为人所知，但Panda Security自 1998 年就已经存在。 

Cloud Cleaner将扫描结果发送回 Panda 的服务器进行分析。这可能足以让你关闭它，这取决于你对这类事情的舒适程度。

特征：

• 高级工具：杀死所有进程^{(Kill all processes)}、解锁文件^{(Unlock files)}、发送文件给 Panda
• 高级选项：受信任的引导扫描，让它扫描引导扇区病毒^{(boot sector viruses)}
• 作为扫描的一部分执行未知文件和系统清理建议^{(system cleaning)}

诺顿强力橡皮擦^{(Norton Power Eraser)(Norton Power Eraser)}

你知道诺顿^(Norton)。他们提供了Norton Power Eraser，这是一种攻击性很强的病毒扫描程序，您可以在完成后轻松下载并删除它。它具有攻击性，可能会产生一些误报。因此，请务必仔细阅读他们的教程，以确保不会丢失所需的文件或程序。

特征：

• 每次运行都会更新
• 不需要的应用程序扫描
• 文件和文件夹的信誉扫描
• 全系统扫描
• 对具有多个Windows^(Windows)操作系统的系统进行多重引导扫描
• 扫描日志
• Rootkit 扫描

在线文件和漏洞扫描程序^{(Online File and Vulnerability Scanners)}

还有其他在线站点可以对文件、网站、您的计算机和家庭网络进行各种病毒和漏洞扫描。这些网站无法删除病毒或修复您的漏洞，但它们可以提出建议。总是多走一步，自己研究问题。

VirusTotal 文件扫描程序^{(VirusTotal File Scanner)(VirusTotal File Scanner)}

您已经下载了一个很酷的新应用程序，但您想在运行它之前确保它是干净的。您可以使用已安装的任何防病毒软件对其进行检查，但第二意见并没有什么坏处。使用 VirusTotal^{(Use VirusTotal)}。 

只需^(Simply)选择要扫描的文件，VirusTotal 就会使用 70 多种防病毒扫描程序和黑名单服务对其进行检查。然后他们会给你结果。下一步做什么取决于你。

GRC 屏蔽端口扫描器^{(GRC Shields Up Port Scanner)(GRC Shields Up Port Scanner)}

这是一个老歌，但很好。Shields Up将扫描您计算机上的前 1056 个TCP端口，并告诉您它们是打开（坏）、关闭（好）还是处于隐身模式（可能更好）。端口是进出计算机的途径。如果您不使用端口，则应将其关闭。

Sucuri 网站扫描仪^{(Sucuri Website Scanner)(Sucuri Website Scanner)}

Sucuri的网站恶意软件和漏洞扫描程序非常适合网站所有者。在几秒钟内检查您的网站是否存在病毒、黑名单、恶意软件和其他漏洞。Sucuri只会就如何解决它发现的问题提供建议。 

适用于家庭网络的 TrendMicro HouseCall^{(TrendMicro HouseCall for Home Networks)(TrendMicro HouseCall for Home Networks)}

TrendMicro 的家庭网络^{(Home Networks)}HouseCall将扫描您的家庭网络，以提醒您任何安全漏洞。如果您的WiFi^(WiFi)路由器、任何智能设备、电话或家庭网络中任何位置的计算机存在安全问题，它会通知您。HouseCall for Home Networks适用于Windows、Mac、iOS 和Android。

哪个免费的在线病毒扫描和删除最好？^{(Which Free Online Virus Scan and Removal Is Best?)}

这取决于您的需求。如果您需要体积小且运行速度快的东西，F-Secure Free Online Scanner可能是最适合您的在线病毒扫描工具。如果您需要更像瑞士军刀的^(Army)东西并且可以做很多事情，EmsiSoft Emergency Kit是一个不错的选择。 

如果您担心设备以外的网络上的事情，TrendMicro HouseCall可以解决问题。关键是这些选项都很好，其中之一将满足您的需求。

8 Best Free Online Virus Scan And Removal Sites

Most computеrs, PC or Mac, come with some sort of antivirus software already installed. Maybe it’s Windows Defender or something else. But no antivirus can catch everything.

If you suspect there’s something strange happening with your computer, try one of these free online virus scan and removal sites.

What Is An Online Virus Scan & Removal Site?

An online virus scan sounds like a website that will scan your computer. That used to be possible. Now, most web browsers run in their sandbox to prevent websites from accessing other parts of your computer.

An online virus scanner and remover is a downloadable, small program that doesn’t install like a regular program. It’s an executable file that runs like a portable app. The app may communicate with the app maker’s site to get virus definitions or send the results to their servers for analysis. Once the scan is done, you can easily remove the program.

Why Use An Online Virus Scanner?

Think of it as getting a second opinion from a different doctor. Doctors are brilliant, but they make mistakes. Same thing with virus scanners. Plus they’re free. If you’re not paying for it, why not use it?

ESET’s Free Online Scanner

ESET’s free online scanner is a downloadable executable. The scanner does call back to ESET’s servers to get fresh virus definitions every time it’s run. 

Features:

• Three levels of scanning: Full, Quick and Custom
• Can be set to alert, quarantine or not quarantine suspected viruses
• Can be set to do monthly virus scans if the executable is not deleted.

F-Secure Free Online Scanner

F-Secure is another well-established name in antivirus. Their free online scanner is as simple as 1-2-3. Click on the Run Now button on their site, run the executable that gets downloaded, and the app will scan for, and remove, any viruses it finds. That’s it. 

At the end of the process, there’s a link to download their free installable antivirus app, but you don’t have to do that. Delete the executable if you want it off of your computer.

Features:

• Simple virus scan and removal
• Quick scan

Panda Cloud Cleaner

Don’t let the cute name fool you. Panda is a serious online virus scan tool. The name may not be as well known outside of IT professional circles, but Panda Security has been around since 1998. 

Cloud Cleaner sends the results of the scan back to Panda’s servers where it gets analyzed. That may be enough to turn you off of it, depending on your level of comfort with that sort of thing.

Features:

• Advanced tools: Kill all processes, Unlock files, Send files to Panda
• Advanced option: Trusted boot scan to let it scan for boot sector viruses
• Performs unknown file and system cleaning recommendations as part of the scan

Norton Power Eraser

You know Norton. They provide Norton Power Eraser, an aggressive virus scanner that you can download and remove easily when it’s done. It is aggressive and is likely to give some false positives. So make sure you go through their tutorial to ensure you don’t get rid of files or programs you need.

Features:

• Updates every time it runs
• Unwanted application scan
• Reputation scan for files and folders
• Full system scan
• Multi-boot scan for systems with multiple Windows operating systems
• Scan logging
• Rootkit scan

Online File and Vulnerability Scanners

There are other sites online that can do a variety of virus and vulnerability scans on files, websites, your computer, and home network. These sites can’t remove viruses or fix your vulnerabilities but they can make recommendations. Always go the extra step and research the problems for yourself.

VirusTotal File Scanner

You’ve downloaded a cool new app but you want to make sure it’s clean before you run it. You can check it with whatever antivirus you have installed, but a second opinion doesn’t hurt. Use VirusTotal. 

Simply choose the file to be scanned and VirusTotal checks it with over 70 antivirus scanners and blacklisting services. Then they’ll give you the results. What you do next is up to you.

GRC Shields Up Port Scanner

This is an oldie but a goodie. Shields Up will scan the first 1056 TCP ports on your computer and tell you whether they are open (bad), closed (good), or in stealth mode (could be better). Ports are ways into and out of your computer. If you’re not using a port, it should be closed.

Sucuri Website Scanner

Sucuri’s website malware and vulnerability scanner is great for website owners. Check your site for viruses, blacklisting, malware, and other vulnerabilities in seconds. Sucuri will only give recommendations on how to fix the problems it finds. 

TrendMicro HouseCall for Home Networks

TrendMicro’s HouseCall for Home Networks will scan your home network to alert you to any security vulnerabilities. It’ll let you know if there’s security issues with your WiFi router, any smart devices, phones, or computers anywhere on your home network. HouseCall for Home Networks is available for Windows, Mac, iOS, and Android.

Which Free Online Virus Scan and Removal Is Best?

It depends on your needs. If you need something that’s small and runs fast, F-Secure Free Online Scanner may be the best online virus scan tool for you. If you need something that’s more like a Swiss Army knife and does a lot of things, EmsiSoft Emergency Kit is a good choice. 

If you’re concerned about things on your network beyond your device, TrendMicro HouseCall will do the trick. The point is these options are all good and one of them will suit your needs.

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