To keep viruses and malware away from your computer, it is not necessary to buy a paid antivirus, in fact there are also free antivirus that is very efficient and equally valid. Often what differentiates a free antivirus from a paid antivirus is the mere presence of a firewall or other accessory programs that may not be necessary for us.

To keep our PC safe, free antiviruses are more than enough, as well as being efficient and light in scanning, without slowing down the computer. According to the most authoritative sites that carry out tests in this sector ( AV-comparatives  and  AV-Test ), the best free and paid antivirus are the following:

  • Avira, Comodo, Kaspersky Free  and BitDefender (free antivirus);
  • Kaspersky, G-Data, and F-Secure ( paid antivirus ).

The evaluation parameters adopted to decree the best antivirus are the following:

  • Ability to detect viruses/malware;
  • Ability to remove viruses/malware;
  • Number of false positives detected;
  • Ease of use;
  • The lightness of the antivirus and amount of resources occupied by the operating system;

Without wasting time, here is the ranking of the best Free Antivirus with a complete description of the software, all the download links, for the various operating systems (Windows, macOS, and Linux).

At the end of the article instead, you will find a survey with the opinion of your users, in which you can add your preference.

Avira Free Antivirus

Avira Free Antivirus (formerly its name was Avira Antivir) is definitely one of the best, if not the best antivirus currently available. Being very light and performing, as well as having excellent detection capabilities.

Often the term “ free ” is associated with something of low quality, but in the case of Avira Free Security, this is not the case. In fact, compared to many other paid Antiviruses, it can detect a greater amount of viruses, rarely incurring false positives. Another peculiar feature is its lightness, in fact, it does not weigh down the system but is almost imperceptible, moreover, it is simple to use, with a reduced and intuitive menu.

You can download Avira Free Security, compatible with Windows 10, 8.1, 8, and 7, Mac, Android, and iOS operating systems, by connecting to the Avira website and clicking on the green button ” Download for free “, after which the download of the file will start. the program.

To start the installation, double click on the file you have just downloaded, a window will open in which you have to click on the ” Accept and install ” button. At the end of the installation, it will be possible to scan your computer immediately by clicking on the ” Smart Scan ” button, otherwise, click on the ” Remind me later ” item to start using the program immediately.

You can download Avira Free Antivirus for Windows,  Mac and Android and iOS mobile devices from the following page:

or alternatively try the paid Pro or Prime version which includes various advanced security tools such as VPN, password manager (a very handy tool for those who have to deal with lots of passwords to remember) and much more.

Comodo Free Antivirus

Comodo is free antivirus software, with an interface in Italian, simple and intuitive, easy to use and install, which stands out for its ability to detect viruses and clean the installationwithout other software included, which many antivirus houses they often feed into their free antivirus.

Comodo Antivirus provides real-time protection for the elimination of viruses, trojans, and worms from communication ports, processes started, also detects, thanks to the Spyware Scanner, malware infections directly in the system registry, cloud detection of malicious files in the absence of update definitions.

To download Comodo Free Antivirus for Windows operating systems (Windows 10 / Windows 8 / Windows 7), connect to the following site, click on the Latest Version button to start the download of the installation file  to start the installation, in the first screen that appears, select the language or Italian and click on ACCEPT.

At the end of the installation, the search for updates and a short system scan will start. Below are the links to download the antivirus version for WindowsMac, and Linux :

Kaspersky Free Antivirus

Kaspersky Lab. Is undoubtedly the reference point for protecting data from threats from the web and beyond. Although the company has always dedicated itself to paid programs, it has finally decided to make a free antivirus program available.

The free version offers the tools for basic computer protection with additional (basic) protection when browsing the web, exchanging messages with instant messaging programs, and exchanging emails. The more advanced features can be “unlocked” by purchasing the license for the paid version.

To download Kaspersky Free for Windows operating systems (Windows 10 / Windows 8 / Windows 7 / Windows XP), simply go to the download page of the Kaspersky website and click on the ” TRY FOR FREE ” button and on the page that opens on the ” DOWNLOAD NOW ”to start the download of the setup file. Once the download is finished, double click on the downloaded file to start the installation procedure.

When the installation file starts, click Continue, in the next screen leave the checkmark if you want to participate in Kaspersky Security Network (KSN) (sharing some data to allow faster alerting, analysis and protection by Kaspersky, it is mandatory to activate it if you want to use the Cloud Protection feature) and click Install.

The installation process will begin (at this stage you must be connected to the internet to allow you to download the antivirus installation files of approximately 150MB), at the end click on Done. At the first start, you will be asked to enter your My Kaspersky account details or to register a new one: it is not mandatory, just click on the arrow at the top left to go to the main screen of the Kaspersky Free antivirus program.

If you do not want to change the settings, Kaspersky Free is already configured to protect your computer for “common” use, however, you can change the settings through the various items accessible by clicking on the gear wheel at the bottom left of the main program screen.

Bitdefender Antivirus Free Edition 2020

Bitdefender Antivirus Free Edition is antivirus software that is simple and quick to install, with an understandable and intuitive interface within everyone’s reach, which performs an initial system scan as is now standard for all the best antivirus.

You can download Bitdefender Antivirus Free Edition, compatible with Windows 10, 8.1, 8 and 7 Service Pack 1, by going to the Bitdefender website or from the link inserted below.

To install Bitdefender Antivirus Free Edition, double-click on the bitdefender_online.exe file you just downloaded, the files necessary for installation will be downloaded automatically. In the initial installation screen, just click on INSTALL (uncheck Send anonymous usage reports if you do not want to participate in data collection).

At the end of the installation, you will be asked whether to log in with your Bitdefender account, in this case, click on SIGN IN TO BITDEFENDER, or do it later by clicking NOT NOW. In order to start using the antivirus, it is necessary to use a Bitdefender account which is still completely free.

By clicking on SIGN IN TO BITDEFENDER a new window will open where you can:
create an account for Bitdefender by entering the required data and clicking CREATE, log in with an existing account by clicking on Sign in. By clicking on Sign inin addition to logging in with a previously created Bitdefender account, you can also log in using your Facebook, Google, or Microsoft account.

After logging in, the antivirus will be active and will keep your computer under control, preventing virus infections in real-time. With the Bitdefender account, you can access a management panel (opens in the web browser) which allows you to control which devices Bitdefender is installed on and install other services such as Parental Control.

Bitdefender Antivirus Free Edition is a stable product, improved in speed, and easy to use. You can download the installation file from the following link (you need to be connected to the internet to install), currently, the new free version is only available in English, however, it is easy to use:

Microsoft Security Essentials

Microsoft Security Essentials is the antivirus in Italian made by Microsoft that can be installed on Windows 7 and Vista, while on Windows 10, 8.1, and 8 it is not available as the Windows Defender integrated protection program is already included on these.

Microsoft Security Essentials has been judged as a valuable tool for real-time protection of your computer and for the detection and removal of viruses and spyware.
As already written, it is available for free, but it is necessary to verify the authenticity of your operating system (ie it must not be a pirated copy) in order to perform the installation.

The update of the definitions is performed automatically, being able to specify when it must be done, and also manually. You can download Microsoft Security Essentials by connecting to the Microsoft website, click on the version of the program you want to download between Windows Vista / Windows 7 32-bit and Windows Vista / Windows 7 64-bit, in this way the download of the mseinstall.exe file will start.

Once the file has been downloaded, double click on it to start the installation, in the first screen click on Next, in the next screen I accept, then choose whether or not to participate in the Customer Experience Improvement  Program and click on Next.

Finally, you will have the possibility to activate the Windows Firewall (do it if you have no others) and deactivate the item Activate the automatic sending of a sample and click on Next and then on Install to start the installation. Once the installation is complete, you just have to click Finish to start the first scan that will first update the antivirus database.

Attention: The program is no longer available since Microsoft ended support for Windows 7, find more details on the Microsoft Security Essentials download page:

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