How To Check If Your Computer Is Infected Online - 10 Ways

How To Check If Your Computer Is Infected Online - 10 Ways

The question of how to check if your computer is infected online is very popular among novice users. Before suggesting testing methods, I recommend that you read the following information about checking for viruses onlineThe main thing is to know that you cannot do a complete scan of all the files on your computer in some Internet site, because then you would have to download all the content of your PC or laptop to that site. But you can:

  • Check individual programs and other files completely online for viruses by downloading them from special services.
  • Download special antivirus utilities that, although called "online scanners", work specifically on your computer, and from the Internet they use an antivirus database to check (which can also be downloaded on your computer). As a general rule, they do not conflict with the antivirus already installed.

This tutorial details the different online virus scanning methods for your Windows 10, 8.1 and Windows 7 computer or individual programs and other files. I should point out that often the cause of certain problems with the work of your computer or the Internet is not viruses, but malicious programs that conventional antivirus 'do not see'. In this case, I recommend trying special malware removal tools.

Online virus scan for individual programs and files

There are several popular online services that allow you to download a suspicious file and get a report on whether it contains viruses or other threats.


VirusTotal - One of the most famous and popular services for checking files for viruses online. All you need to check a program file (or other file, but not a rar file - unzip such files beforehand) is to perform the following steps:

  1. Go to
  2. Drag and drop the file to be checked with the mouse to the window with the site open, or click "Choose file" and specify the file on your computer.
  3. Wait for the file virus scan to finish.
  4. You can also check an Internet address for viruses by entering it in the URL tab.

Final report: The VirusTotal interface has recently been updated and the Russian interface on the main page has disappeared. But I guess the translation will show up.

VirusTotal stands out because it checks using many antivirus "engines" at the same time, that is to say, the report produces a global image compiled by several known and not so well known antivirus. Consider the following points:

  • Single detections often indicate a false positive.
  • Remote access programs to the computer and the PC configuration and optimization utilities (tweakers) usually show a significant number of detections: in this case, the result texts must be studied. They usually report that it is RiskWare, software with potentially dangerous characteristics (and any program for remote computer management or deep modification of Windows operation can be classified as such).
  • In addition to the test results for known files, you will also be able to see the community feedback in the upper right corner (Community Score) and on the Community tab. It can also be consulted if you have any questions.

An additional feature is the official VirusTotal browser extension, which allows you to check files for viruses without downloading them to your computer.

Kaspersky Threat Intelligence Portal

Previously, Kaspersky's online file scanning service for viruses was called Virusdesk, now it is Kaspersky Threat Intelligence Portalwhose website is: and the Russian version has not yet appeared.

The essence of use is the same as in the case of VirusTotal:

  1. Transfer the file with the mouse or download it from your computer by clicking the "Browse" button and press the "Analyze" button.
  2. As a result, the service will show whether the file is clean from Kaspersky's point of view (the fact that the file is clean will be indicated by "Clean" under the SHA-25 checksum of the downloaded file.
  3. You can also enter the hash (file checksum) or site address on the main page of the service and click "Search" for a quick check.

Dr.Web scans a program or file online

У Dr.Web. It also has its own online service to check files for viruses and other threats, available at

It is probably easier to use than any other similar service: load a file in a single field in the center of the browser window, scan it, get a short result in Russian.

Hybrid analysis

The downside of the above two scanning methods is that they are limited to a single antivirus performing the scan. VirusTotal does not have this disadvantage, but if you are interested in even more powerful online virus checking tools, I recommend that you get to know Hybrid analysis.

At first glance, the service does not differ much, but during the scan you will be able to choose a virtual machine to run your suspicious file and get very detailed and easy-to-study reports on the analysis performed. Separate instructions on how to use the service: Online virus scan in Hybrid Scan.

Nano Antivirus online scanner.

On the official website. Nano Antivirus en «Servicios» hay un escáner en línea para comprobar los programas y otros archivos en busca de virus.

I cannot draw conclusions about the quality of the check, the result was immediate. And one more nuance: limit the size of the downloadable file for testing to only 20 Mb.

Online scanners to check your computer for viruses, it does not conflict with installed antivirus

The second part refers to special scanners that use a current antivirus database from the Internet and usually download it to your computer, then scan the running processes and files on your PC or laptop without conflicting with your existing antivirus.

ESET Online Scanner

ESET Online Scanner - One of the most famous scanners for free computer virus scanning and removal, which works without installation (but files and database will need to be downloaded):

  1. Go to the official ESET Online Scanner website and click the 'Run' button. You will be asked to enter your email address (not checked) and download the file to run.
  2. Run the downloaded file, accept the agreement, and wait for the files to download from the online scanner.
  3. After downloading and starting it, click "Start" and select the type of scan (Full scan, Quick scan, or Selective scan).
  4. Specify whether to quarantine potentially unwanted applications (that are not viruses). Please note that if you allow this, unlicensed or other questionable software on your computer may stop working. Click the Run Scan button.
  5. The online scanner will download an antivirus database for some time (it depends on the speed of your internet connection) and then it will scan your computer for viruses and other threats.

Comfortable Cleaning Essentials.

Comodo Cleaning Essentials - It is not just a virus scan tool using the latest online antivirus databases, but also additional tools including a task manager and autoloaders with scanning for malicious and potentially unwanted items, as well as a tool to clean your system of unnecessary components.

For an overview of the toolkit and how to download them, see the article Malware removal and other Comodo Cleaning Essentials features.

F-Secure Online Scanner

Even though the website F-Secure Online Scanner it does not have a Russian interface, the free online scanner itself is exactly in Russian - download the file from the official website, run it and click "Accept and Check" to run the online virus scanner.

The scan is fast and I hope it is quite effective: F-Secure, although not very well known in our country, is among the highest quality antivirus.

Cloud virus scanning in Panda Cloud Cleaner

Panda Cloud Cleaner - Another online scanner to check your computer for viruses using the database of a well-known antivirus developer:

  1. On the official website, click "Scan Now" on the left to download the scanner. Run it: this utility requires an installation on your computer.
  2. Once installed, start Panda Cloud Cleaner and click "Accept and scan" in the main window.
  3. Wait for the antivirus to finish checking your computer for viruses.
  4. Once completed, you will see a result made up of three items: Known Threats, Unknown Files and Suspicious Policies, Options to Clean the System from Optional Items. Only the first point is critical, the rest can be left unchecked if in doubt.

Online checking of running processes for viruses in CrowdInspect

CrowdInspect it works differently from the other online virus scanning tools listed in this review. The program does not require installation on your computer, and after launching it opens a kind of task manager that shows the processes that are running on your computer and the results of their verification by various means, including the Hybrid Analysis mentioned above.

The utility is great and I recommend having it in your arsenal. An overview of the tool's features and where to download it - How to check Windows 10, 8.1 and Windows 7 processes for viruses in CrowdInspect.

Trend Micro HouseCall - Online Computer Security Scanner

Trend Micro is a popular antivirus product developer, little known to the Russian-speaking user. Call home - an online virus scanning utility from this developer, available for free download on the official website

Once you have downloaded Trend Micro HouseCall and accepted the license terms, all you have to do is press the 'Scan Now' button to start the scan (note that the initial initialization process may take a few minutes - the antivirus database will be downloaded and the process is at 0%).

The scanner will scan programs on automatic startup, running processes, other typical locations for viruses and other threats, and files on drives. Upon completion, you will receive a report on the malicious items found with the option to remove them.

Windows malware removal tool

On the Microsoft website there is an official malware and virus removal tool that is regularly updated and does not require installation on the computer. I don't know if it's wise to use the utility in the presence of an upgradeable Windows Protector, but I thought I'd mention the utility's availability.

The official page of the Microsoft Windows Malware Removal Tool - By the way, of these types of scanners, I would highly recommend AdwCleaner - in my experience it detects significantly more threats than other similar utilities. The Best Free Antivirus material can also be helpful.

Online virus detection video

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