Avast offers a free protection for everyone, but in order to use it, you need to obtain a serial key. Why it needs a serial key if it’s a free product? That’s a really good question, but you probably need to ask Avast directly. Anyway, for some users, it may a struggle to obtain such a key, so we are giving it out to everyone. The serial key below will give you a completely free protection until March 2019.

We will also explain to you how to insert it into your Avast using a step-by-step approach and screenshots, so really everyone can do it. Even if you are a beginner user.

Please note the serial key is valid only for Avast Free Antivirus 2018 running on Windows XP, 7, 8 or 10. In case you don’t have it downloaded, go to our Downloads page. If you are looking for a serial key for Avast Pro Antivirus, Avast Internet Security, or Avast Premier, there isn’t any free one. The only way to get one is to actually purchase a premium version.

Avast Free Antivirus 2018 Serial Key Valid Until March 2019

Below is the free serial key which you can use for personal purposes. Simply copy it to the clipboard using CTRL + C and insert it into your Avast.

NXNW5H-4AKMF2-4EU5F2

If you don’t know how to insert it, follow the next section.

How to Insert the Key Into Avast

  1. Open your Avast interface and go to settings (cog wheel icon in the left-bottom corner of the user interface) » ‘Subscription‘. You can also get there by right-clicking on the systray Avast icon and selecting ‘Registration information
  2. Click on ‘Insert activation code
  3. Enter the license key above (NXNW5H-4AKMF2-4EU5F2) and confirm by clicking ‘OK
  4. Now you should be able to use the free protection for the full year valid until 03/16/2019. You can check the subscription details in the ‘Subscription‘ area

If you have done everything correctly, you should see the following information.

Avast Free Antivirus 2018 Serial Key Valid Until March 2019

Avast Free Antivirus 2018 Serial Key Valid Until March 2019

What’s the Difference Between Serial Key and Activation Code

Basically none. Some users are referring to this unique code as a serial key while some as an activation code. Serial key is being the more old-school term. Within the product user interface, Avast always talks about activation code.

Avast serial key for all products is always 18 characters long divided into 3 sections (6-6-6). Sometimes this piece of characters is also being called serial number, but that’s wrong in case of Avast as it always contains both characters and numbers.

Additional Notes

Although we have used Avast Free Antivirus 2018 screenshots in this article, these steps are also applicable for all Avast Antivirus solutions (i.e. also for Avast Pro Antivirus, Avast Internet Security, or Avast Premier) running the latest version available.

Steps are relevant for all Windows versions – Windows XP, Windows Vista, Windows 7, Windows 8, Windows 8.1 and Windows 10 (including Anniversary Update).

Written by Paul B.

My name is Paul and I love Avast since the Home Edition v4.8 (2008). I am recommending it to all my friends, but I realized they don't know how to use it. So I started this site in order to help others getting maximum from this awesome antivirus. Feel free to contact me via Facebook, comments below or this form.

This article has 16 comments | Did we miss anything? Just let us know in the comments!

  1. Rob Reply

    It does not work. I get this vague message: “The request cannot be processed at this moment, please try again later.”

    This message appears when my firewall blocks all programs except for those I gave permission to communicate with the internet. This message also appears when I temporary let my firewall unblock all programs.

    The activation code seems to be valid, because when I change the activation code, I get this message: “The activation code is invalid. Please make sure it was typed correctly.”

  2. sun Reply

    Thanks everyone for sharing the Avast key. its working. I appreciate.

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