How to Unblock League of Legends From Avast


League of Legends by Riot Games is one of the most popular online games, with millions of monthly players.

And what do all gamers who are into multiplayer games and online gaming need?

Well, they need to have antivirus programs protecting their computers, and one of the most commonly used is Avast, but it can often cause problems for League players.

Unfortunately, many players experience Avast blocking League of Legends.

So here’s a complete guide to help you figure out the possible causes of why Avast is blocking League of Legends and how to unblock your IP address easily.

With this, you can return to destroying your opponents in no time!

Are you having trouble with lag? You might like How to Reduce Ping in LoL.

Locating the Avast League of Legends problem

Before you decide which method to unblock League of Legends from Avast, it is important to know which of the three most common reasons is causing the issue.

  1. The Avast software flags the League of Legends files as potential threats, aka a false positive
  2. The Avast Antivirus software’s virus definitions are outdated.
  3. League of Legends VANGUARD sees the Avast Shield as a threat. VANGUARD is League of Legends’ built-in anti-cheat process and does its best to keep players honest.

Below, you can read about each of these possible reasons in more detail.

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Problem #1: League of Legends is Flagged as a False Positive

Avast sometimes flags League of Legends as a virus and sends the game files into quarantine. This is known as a false positive and causes compatibility issues.

It is not a difficult fix, but it will take some time as it requires a full computer scan and then setting up virus exceptions for Avast. 

Solution: Run a Full Scan and Add Virus Exceptions to Avast

First, you have to run a full computer scan so that Avast will mark malicious files, and you can see which ones, including the League of Legends files, it is marked as malicious and put into quarantine. 

Once the scan is completed, you need to go into Avast’s quarantine and locate the blocked file named “LoLPatcherUx.exe.”

Select the file and then add it to Avast’s virus exception list. This will remove it from the Avast virus chest, so the software will stop thinking that the file is malicious and crashing League of Legends.

Dare to check how many hours you played League of Legends?

Problem #2: Out-of-Date Avast Virus Definitions

Since so many League players use Avast, it is almost guaranteed that if there is a problem with Avast and League of Legends, the Avast team is usually quick to send out a patch so users can get back to complaining about ally Yasuos.

So before you spend the next three hours trying to fix the problem, check the Avast Community Forum to see if a patch was released.

If so, update your Avast protection to the latest version. Here’s how:

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Solution: Updating Avast Virus Definitions

Since League of Legends being blocked can be caused by out-of-date virus definitions, you will want to update them when you notice an issue between Avast and League of Legends.

To do this, follow the steps below! 

Note: When you go to the “Update” tab in Avast’s software, there will be two “Check for Updates” buttons. The top automatically searches for and installs new virus definitions, while the bottom updates the entire software. While that can be useful, you want to press the top to fix the problem between Avast and League. 

  1. Open Avast.
  2. Go to “Settings” and navigate to the “General” menu.
  3. Locate the “Update” tab and then press the top update button.
  4. If there are any new virus definitions, the software will automatically locate and install them!

Check out how to activate XP Boost in LoL.

Problem #3: Avast Shield is Seen as a Threat

Occasionally, the Avast Shield software triggers League of Legends’ VANGUARD, and it thinks Avast is something you use to cheat.

Since it thinks Avast is cheating software, and then Avast gets triggered, League of Legends crashes, and you are stuck, unable to play.

While it is a quick fix to deal with this, it is often just a temporary solution. 

Solution: Add VANGUARD to the Avast Exception List

When Avast Shield and VANGUARD butt heads, you will need to add VANGUARD as an exception in Avast’s anti-virus software to prevent that from happening again.

Since this can be slightly complicated, check out the full instructions here on Avast’s official software website.

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When all else fails: disable the Avast Web Shield

Okay, this next solution should only be viewed as a temporary fix because it involves disabling the Avast security app entirely.

Now that you know why League of Legends gets blocked by Avast, it is time to learn the easiest ways to unblock the game.

None of them are very difficult to do, though it can take some time to identify what is causing the issue and then implement the proper fix so you can return to playing.

If you are looking for a quick and temporary solution because you want to play a few games and will worry about fixing it later, disabling the Avast Shield software is an option.

However, you should only do this for a short period, as your device will be left vulnerable while it is disabled. 

Disabling Avast Shield:

  1. Open Avast Antivirus.
  2. Go to “Menu” and then click on “Settings.”
  3. In “Settings,” locate “Protection.”
  4. Open “Protection” and select “Core Shields.”
  5. A toggle in the top-right turns on and off the Core Shield modules.
  6. Toggle it to the off position to disable Avast Shield!

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While playing and keeping your computer safe from viruses normally causes no issues, occasionally, Avast decides it no longer likes the League of Legends game.

Following the above advice can quickly and easily fix this problem! Here’s a quick summary:

If the problem is that Avast sees LoL as a threat (a false positive), you need to let the League of Legends client escape quarantine.

If your virus definitions are outdated, you need to update them.

If the anti-cheat protection VANGUARD sees Avast as a threat, you must add Avast client software to the VANGUARD exception list. You will find the instructions in the link further up in the article.

If all else fails, you can disable your Avast antivirus program entirely. Naturally, this takes care of any Avast League of Legends issue related to Avast.

Again, this is not the best way to go in the long run because disabling Avast’s detection leaves your internet connection and computer vulnerable to a huge number of nasty viruses, trojans, malware, DDoS attacks, and harmful webpages.

If you found this article helpful, check out some of my other articles, like this one on getting an S rank in League of Legends. Until next time, happy gaming!


Is Avast free?

There’s both a free and paid option for Avast available. You can find the Avast free antivirus here.

What’s Avast VPN?

Avast is one of the biggest VPN providers and offers one of the best VPNs online. VPN is short for Virtual Private Network and is a tool that ensures your privacy while surfing the web by encrypting your connection and hiding your IP address. You can find additional info here.

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Jan has played video games since the early 1980s. He loves getting immersed in video games as a way to take his mind off stuff when the outside world gets too scary. A lifelong gamer, the big interest led to a job as a lecturer on game sound at the University of Copenhagen and several written articles on video games for magazines.

Read more on the About Page.