Many manufacturers of security products produce free versions of antiviruses, which can be completely freely downloaded from the official website of the manufacturer and used on your computers.

Most developers only include anti-virus scanners without real-time protection in their free editions, but there are developers who provide a full range of tools to protect your data in their free version.

Below is a selection of antiviruses that you can download and use absolutely free.

07/19/2018, Anton Maksimov

Joins the ranks of free antiviruses with constant protection a new version Kaspersky Lab product called Kaspersky Free. If previously they only had a healing utility ( antivirus scanner Kaspersky Virus Removal Tool), they now also release permanent protection file system and protection from malicious sites on the network.

06/12/2018, Anton Maksimov

Security is never enough. Many manufacturers of security systems think so. Including the developers of free antivirus 360 Total Security, which includes as many as 5 engines. Yes, this antivirus has many different engines, each of which performs its own task. This includes virus detection mechanisms from Avira and Bitdefender, proactive protection QVM II, the 360 ​​Cloud cloud system and the System Repair system recovery system.

04/18/2018, Anton Maksimov

Avast Free Antivirus is a free antivirus package with always-on protection. Great for home use. In addition to the anti-virus module itself, it has a number of additional tools, which will help save data and protect you from online threats.

01/11/2018, Anton Maksimov

So we got our hands on it free Comodo Internet Security. This is a set of tools to protect your computer, which includes a firewall, antivirus and proactive protection module. I will not describe all the features of Comodo Internet Security, because, in my opinion, they are standard and are present in most similar programs. The main difference between this program and the others is that it is free and amazingly reliable. At correct setting The program allows you to secure your computer to the maximum. I watched a few the other day comparative tests who carried out various companies, and the results of these tests quite surprised me. As an example, I will give the results of one of these tests.

10/05/2017, Anton Maksimov

AVG AntiVirus FREE is a world-famous antivirus program that is available free of charge to home users and is already used by millions of people around the world. Unlike many free scanners from large antivirus laboratories, AVG is a full-fledged product that can ensure the full security of your PC. AVG Anti-Virus FREE is easy to use and does not slow down the operating system (has low system requirements).

07/12/2017, Anton Maksimov

Today I will talk about another free antivirus, Avira Free Antivirus, which recently settled on one of my computers. The situation with it is special, since this antivirus is not a simple scanner; it does not need to be downloaded every time you need to check the system. This antivirus hangs in memory and does everything on its own. Independently downloads and installs updates, independently checks files accessed by the operating system and various applications.

A massive attack by the WannaCry ransomware (WannaCryptor, WanaDecryptor) led to the infection of tens of thousands of computers in organizations and public institutions around the world. The malware uses a known vulnerability described in security bulletin MS17-010 and a combination of EternalBlue/DoublePulsar exploits that allow it to attack other vulnerable Windows systems on the same network. As a result, infection of one computer can lead to compromise of the entire corporate network In the organisation.

Once a vulnerability appears on a computer due to successful exploitation, WannaCry ransomware encrypts all files and documents of certain formats, performing remote commands, sent over the SMB protocol, and spreading to others Windows computers online.

Perhaps you are too trusting and therefore have not installed an antivirus on your PC, or the license for your antivirus has already expired, or the antivirus you have installed does not provide maximum protection, and... maybe your PC is infected!

02/20/2015, Anton Maksimov

For the vast majority of households Windows users 7 and Windows 10, a standard antivirus product from Microsoft is quite suitable. In the Windows 10 operating system, it is already built into the system called Windows Defender (Windows Defender) and does not need to be additionally downloaded and installed. But for Windows 7 you will have to install it by downloading the distribution kit Microsoft Security Essentials on the Microsoft website. Essentially, they are the same product, but with different names for different systems.

07/22/2013, Anton Maksimov

Dr.Web CureIt! - an antivirus that is noticeably different from the programs everyone is familiar with. This utility does not work constantly, preventing the appearance of malware on the computer. It allows you to cure an already infected PC from viruses, Trojan horses, rootkits, etc. This feature of Dr.Web CureIt! determines the scope of application of this product. It can be used periodically to check the reliability of the antivirus installed on your computer, as well as in cases where, based on indirect signs, you can suspect a PC infection. In general, I benefit from Dr.Web CureIt! difficult to overestimate.

06/26/2013, Anton Maksimov

Continuing the popular topic of free antivirus, I would like to mention another development that I became acquainted with relatively recently and which I have not yet had time to write about. In theory, it would be possible to add this information to the original message, but I decided to put everything in the form of a separate note. So, today we will talk about a free antivirus from Kaspersky Lab called Kaspersky Virus Removal Tool.

10.21.2009, Anton Maksimov

Interesting free antivirus program Published by Microsoft Corporation. The utility is called Malicious Software Removal Tool. malware for Microsoft® Windows® OS). This tool is in automatic mode scans your computer for a range of malware and immediately removes them when found. The tool is not a replacement for a regular antivirus utility; it only allows you to perform a quick analysis for the presence of common viruses.

Antivirus ESET NOD32 Smart Security– a powerful utility for round-the-clock comprehensive protection of your computer from various types of spyware and viruses.

The anti-virus tool in its arsenal has a personal firewall with high-level traffic protection and technology for protecting monetary transactions, blocks email spam in services, has a developed system of notifications about the detection of a potential threat, and also tracks a stolen or lost PC using “anti-theft”.

BitDefender Antivirus – free antivirus utility, providing comprehensive computer protection against malware, spyware, hackers, and data interceptors in Wi-Fi networks and various kinds of viruses.

The application protects the system from such annoying and dangerous software as Trojan and phishing software, ransomware, password harvesters and interceptors. The basis of Bitdefender’s work is its own powerful engine, a winner of various tests and a guarantor of quality and stability.

Panda Free Antivirus is a free cloud antivirus utility with effective methods of protection against malicious attacks and low load on the computer system.

The program developers focused on minimizing system load by distributing the bulk of the work into cloud storage. Thus, on special servers analyzes and creates the most effective methods in the fight against the latest threats.

McAfee Security Scan Plus is a free anti-virus utility that is a scanner that determines the potential threat and level of PC security.

Searches for malicious objects in active applications and checks the security of the antivirus, firewall and system as a whole. The scan itself takes a few minutes and shows the threats found and the protection or lack thereof in the system. Upon completion of the scan, a report is issued and, if a threat is present, installation is suggested full version McAfee.

Comodo Antivirus is a free antivirus utility that creates powerful protection computer and performs scanning of active system processes.

Despite the ability to download Comodo Antivirus for free on your computer, this application provides no less high-quality protection than its paid competitors. Even in minimized mode, the program continues to monitor malicious software and protect against Trojans and viruses trying to take over the system from the Internet.

Today, not using an antivirus when browsing the Internet is akin to suicide. However, there are individuals who neglect this golden rule and catch clouds of various infections on their computer. Very often you can save the situation by checking with an antivirus without installing it in operating system Windows. Moreover, after infection, very often malware does not allow you to install anything else. Today I will talk about several anti-virus scanners that work in portable mode. Such a utility can be downloaded to a USB flash drive and run on an infected system. In 80% of cases, this helps to return control of the computer to your own hands in order to at least have time to save important data.

The best antivirus without installation - TOP3

1. DrWeb CureIT
I have been using this anti-virus scanner since its creation and that is why it is number one for me! And I can’t even count how many times he helped me out at work! Dr.Web CureIt! by far the most popular so-called online antivirus, which is constantly updated and has no conflicts with other antivirus software, if one is already installed on the PC. You can download it here - link.
Once launched, the application will ask you to accept the terms of the license agreement. And then you will see this window:

Click the “Start scan” button and the utility will carry out all the necessary checks random access memory, running processes and system folders, after which it will give a list of what was detected and suggestions for further treatment of the OS.

2. Kaspersky Virus Removal Tool - KVRT
This antivirus without installation was released as the main competitor of the previous program. The program was released by the world's most famous antivirus laboratory, Kaspersky.

The KVRT action algorithm is similar to DrWeb CureIT. Download the application here - link. Then we launch, accept the license and click the “Start verification” button. After checking, we agree with the proposed course of action and wait until the found infection is destroyed! Upon completion of the work, you will receive a report from the program about the work done!

3. ESET Online Scanner
Currently, ESET scanner Online Scanner is the only full-fledged online antivirus that uses cloud technologies. I think it’s clear that to scan your PC and remove viruses from it, you need to have active connection to the Internet.

The utility pleased us with its size - just over 6 megabytes versus 140-150 in the previous two cases. Easy to download here - link, easy to work! Detects sufficiently large amounts of modern viral infection! Although I often hear complaints from users about its work. I use it infrequently and only when needed quick check for viruses without installing an antivirus, and there is no time to download the previous two solutions, or checking the system with their help did not produce any results. You can download online antivirus from ESET for free here - link.

Other portable antiviruses (Portable)

In general, there are not many Portable antiviruses now; I have named the best of them above, and below I will list a few alternative options rather even for informational purposes. Using them, as a rule, does not give significant results (well, with the exception of Komodo, perhaps), although sometimes these portable utilities even find and cure something.

Comodo Cleaning Essentials (Free Malware Removal Tool)

This is not just an online antivirus, but a whole set special utilities, which includes a portable scanner, startup and process analyzers, and a spyware and adware module detector, Hijack Cleaner. In principle, I can’t say anything particularly bad about Komodo. I used their programs quite a lot and often. Now I only use it when there are no normal alternatives at hand.

Another online antivirus from F-secure, using their proprietary Lighthouse technology. He stands on Facebook’s behalf—probably this also speaks to some of his benefits. As for me, he is beautiful on the outside and rather weak on the inside. There are a lot of errors in operation and complaints from dissatisfied users.

TO software products I have had a negative attitude towards Norton since the days when I had to uninstall them in batches on client laptops. This heavy, clumsy monster slowed down the system and almost did not even find known viruses. How their vaunted Symantec heuristics works is a mystery to me. I frankly dislike their products and the antivirus scanner without installing Norton Power Eraser is no exception. His aggressive interference in the operation of the computer is very annoying. It would be nice if he only looked for viruses, but this infection also tries to fix the registry. And after such fixes, you can get a non-working Windows. So if you decide to use it, be sure to check the box to create backup registry!
And yes, it often works on normal regular programs. This can be seen in the screenshot.

Microsoft has never been seriously involved in antivirus software and circumstances forced them to take this path. Their portable antivirus is even heavier in weight than analogues from Doctor Web or Kaspersky. The application does not work very quickly - the verification takes a lot of time. Sometimes he even finds something. If you surf the Internet, you will find quite a few positive reviews about the Microsoft Safety Scanner.