The Among Us anti-cheat error usually appears when the game tries to verify the integrity of the client and its connection to the servers, but the verification fails. The result is simple and frustrating: you cannot connect to online mode, you get kicked from a lobby, or you receive a message saying that your client does not meet the security requirements.

In the context of pixelzona.net, this is not an uncommon topic: we found 36 mentions of this problem in our review articles. These are not percentages, but the number of occurrences detected in the collected review text. In other words, it is a specific, recurring issue that is worth fixing methodically rather than trying random solutions.

This guide focuses on one specific situation: Among Us displays an anti-cheat error and prevents you from playing online reliably. Below, you will find clear symptoms, causes, and safe, practical steps ranging from the simplest to the more advanced.

Before you begin, I recommend taking 30 seconds to prepare: write down exactly when the error appears. Does it pop up while connecting to a lobby, a few seconds after entering one, only in a specific region, or only in friends’ lobbies? This one sentence will save you a lot of time later because the solutions differ depending on the stage at which the anti-cheat verification fails.

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Quick summary

• An anti-cheat error usually means that the client integrity or connection verification failed, so online mode is blocked or you are disconnected from the lobby.
• Start with the basics: update the game and Steam, restart your computer, disable your VPN, and check the system time.
• Steam file integrity verification and firewall or antivirus permissions usually help, especially if there have been recent updates.
• A quick 10-minute A/B test points you in the right direction: if it works through a phone hotspot, the network is responsible; if it still does not work, a PC conflict, permissions issue, or corrupted files are more likely.
• If nothing helps, collect Player.log and system information, then contact support with a clear description and a list of the troubleshooting steps you tried.

Who this is for / who it is not for

Who this is for: players who receive an anti-cheat error when connecting to Among Us online mode, get kicked from a lobby, cannot start a match, or are disconnected after a few seconds with a security verification message. It also applies if the error appeared after an update or after installing a new antivirus, VPN, or overlay tool.

Who this is not for: players experiencing a completely different problem, such as the game not launching at all, freezing on the loading screen without an anti-cheat message, or being unable to connect to the servers because of a general connection issue that mentions server overload or maintenance. Some of the networking advice may still be useful in those situations, but that would be a different specific problem.

Symptom matrix: what you see → what to try

Why this happens

In the context of Among Us, an anti-cheat error usually does not mean that you are actually doing something wrong. Instead, it means that the game’s security verification cannot confirm that the client is operating as expected. This verification relies on several factors: the condition of the game files, connection reliability, system time, and whether anything is preventing the process from running normally.

• Version mismatch: the game, Steam, or related components did not update completely, so the server detects a mismatch.
• Corrupted or missing files: after an update, some files may be corrupted, may not have downloaded completely, or may have been locked by security tools.
• Failed connection verification: an unstable internet connection, restrictive router, incorrect DNS, VPN, or proxy may interfere with verification.
• Blocking by security tools: a firewall, antivirus, or Windows Security protection feature may block the process, connection, or ability to write to the required folders.
• Background programs and overlays: recording, overlay, filtering, or performance-monitoring tools sometimes cause conflicts because anti-cheat logic protects the process from unexpected interference.
• Incorrect system time: if the computer’s time is significantly incorrect, authentication and security verification may fail.
• Permissions issue: if Steam or the game does not have permission to write to certain directories, or files are marked as read-only, verification may fail even when the files themselves are correct.

Important: this guide does not include any attempts to bypass anti-cheat. The goal is to eliminate false conflicts and fix files, connections, and permissions so that the game works normally.

Solutions: from the simplest to the most advanced

The steps below are arranged so that you perform safe and quick actions first before moving on to those that require more time. After each step, launch Among Us and test the online connection so that you know what actually helped.

0) A quick control question: is this really anti-cheat and not a server issue?

If the error started suddenly and several people are seeing it at the same time, take one minute to check whether you can connect to another region and whether the problem is the same everywhere. If every region fails immediately while your internet otherwise works normally, it is especially important to move on to the file and permissions steps rather than focusing only on the network.

1) Restart and update the basics

1. Close Among Us and Steam.
2. Restart your computer.
3. Launch Steam and wait for it to update completely.
4. Check whether Among Us has a pending update.

This step often fixes situations in which the anti-cheat error appears after an incomplete update or a stuck process. If Steam has been left running for several days without a restart, close it completely and launch it again instead of simply minimizing it.

2) Verify the integrity of Steam game files

1. Find Among Us in your Steam library.
2. Open the game’s settings and select the file integrity verification option.
3. Wait for the process to finish, then launch the game again.

If files were corrupted, this verification is often the quickest and safest fix because you do not have to replace anything manually. Practical tip: after verification, launch the game at least once and let it load normally to the menu so that any additional files can be created correctly.

3) Clear the Steam download cache if updates behaved strangely

If you noticed that the Among Us update was stuck, repeatedly restarted the download, or suddenly completed within a few seconds, it is worth clearing the Steam download cache. This is not risky, but you may have to sign in to Steam again.

1. Open the Downloads section in Steam settings.
2. Select Clear Download Cache.
3. Sign in again and verify the integrity of the Among Us files once more.

This step often helps when the anti-cheat error began specifically after a failed update.

4) Disable your VPN and simplify the network

1. If you use a VPN or proxy, disable it and relaunch the game.
2. If possible, try a wired internet connection instead of Wi‑Fi.
3. Restart the router, wait a few minutes, and then try connecting again.

Anti-cheat verification often requires a stable, unmasked connection. A VPN can change the route or IP region, or cause packet loss, which sometimes results in a disconnection with an anti-cheat error. If you have multiple routers, a Wi‑Fi extender, or a network booster at home, connect directly to the main router for testing.

5) Check the system time and time zone

1. Enable automatic time synchronization in Windows settings.
2. Check that the correct time zone is selected.
3. Click Sync now if that option is visible.
4. Restart your computer and try again.

It may sound trivial, but incorrect time is a genuine reason why authentication checks sometimes fail. This is especially common if the computer has been in sleep mode for a long time, the CMOS battery was replaced, or the time was manually adjusted for other programs.

6) Allow Among Us through the firewall

If the firewall is blocking the connection, the game may connect partially, but the anti-cheat verification will be unable to communicate fully and will disconnect you. The goal is not to disable protection, but to create clear permission rules.

1. Open the Firewall settings in Windows Security.
2. Allow Steam and Among Us to communicate on private networks.
3. If the computer is sometimes used on public networks, check the public network rules as well, but only allow what is necessary.
4. If you use a third-party firewall, check its application list and connection blocks.

If you can see that the rule has been created but the error still recurs, check for overlapping protection. For example, a third-party antivirus with its own firewall may have separate rules.

7) Check the antivirus quarantine and exclusions

After an update, some antivirus programs may flag a new file as suspicious and move it to quarantine. The missing file then triggers the anti-cheat error. It is important to remain cautious here: only restore files officially obtained through Steam.

1. Open the antivirus quarantine and check for Among Us or Steam files.
2. If you find any, first verify the integrity of the Steam game files, then check whether the antivirus moves anything to quarantine again.
3. If the antivirus repeatedly blocks the files, add the Among Us and Steam folders to the allowed list only if they are in standard Steam library locations and the files were restored through Steam.

Avoid downloading unknown files or so-called patches from forums. Anti-cheat errors are often used as an excuse to distribute malicious installers.

8) Windows Security: check Controlled folder access and protected locations

Windows may block programs from attempting to write to certain directories. If the game cannot create or update its files where needed, anti-cheat verification may interpret this as an unusual state.

1. Open Windows Security.
2. Find Ransomware protection and check Controlled folder access.
3. If this feature is enabled, review Block history and check whether Steam or Among Us is mentioned.
4. If you see a block, add the program to Allowed apps instead of disabling the protection completely.

This step is especially relevant if the error appeared after a major Windows update or after you enabled stricter protection.

9) Launch permissions: try without compatibility modes or unusual launch parameters

Sometimes anti-cheat verification conflicts not with the game itself, but with the way it is launched. In practice, this can happen when compatibility mode is enabled, the game is launched through a third-party shortcut, or Steam launch parameters remain from previous troubleshooting attempts.

1. Check Launch options in the Steam game settings and clear everything for testing if any entries are present.
2. Check whether Compatibility mode is enabled for the game’s exe file.
3. Launch the game directly through Steam instead of using a modified shortcut.

If you are using a family computer or a work profile with restricted permissions, try one more test: launch Steam as an administrator and check whether the situation changes. If it does, that indicates that the problem may be related to permissions or security policies rather than the game itself.

10) Disable unnecessary overlays and background tools

Anti-cheat security logic reacts sensitively to programs that interfere with the game process. Even if they are not cheating tools, the result can be the same: disconnection or blocking.

1. Temporarily disable unnecessary overlays: Steam Overlay, Discord overlay, GPU tool overlays, FPS counters, and screen filters.
2. Close performance optimizers that change process priorities or offer automatic game optimization.
3. If you use recording software, disable background recording for the test and leave only the basic configuration active.
4. Leave only Steam and the game running, then test the connection.

If everything works afterward, enable the tools one at a time and observe which one triggers the anti-cheat error. The goal is to identify the conflict rather than live with everything permanently disabled.

11) Drivers and Windows components: update them, but do it properly

Among Us is not a demanding game, but anti-cheat verification still depends on a stable system environment. Old network drivers, unusual VPN adapters, or outdated security components sometimes produce a predictable result: verification fails and you receive an anti-cheat error.

1. Update Windows through Windows Update and restart your computer.
2. Update graphics card drivers only through the manufacturer’s official channels.
3. Check the network adapter drivers in Device Manager. If you have recently experienced major network problems, it may be worth installing the latest driver from the manufacturer’s website.
4. If you have used virtual network adapters, temporarily disable them for testing, but do not modify or delete unknown system components if you are unsure.

If the problem started after a driver update, the first safe step is not an aggressive reinstall, but a return to a stable configuration: disable new overlay features and check whether the error still recurs.

12) Check Windows system integrity if the error is extremely persistent

If the anti-cheat error remains even after a clean game installation and is clearly unrelated to the network, it is worth checking whether Windows has any corrupted system files. This is not a solution specific to Among Us, but it can sometimes eliminate unusual authentication and security errors.

1. Open Command Prompt as an administrator.
2. Run sfc /scannow and wait for it to finish.
3. Restart your computer and test Among Us online.

If you are not sure whether you need this, leave this step until the end. For most players, the anti-cheat error is fixed earlier with simpler actions.

13) Reinstall Among Us as the final software-related step

If the error remains after all the steps above, reinstalling often clears stuck files and restores the standard state. To keep the test clean, perform the reinstall properly.

1. Uninstall Among Us through Steam.
2. Restart your computer.
3. Install Among Us again and immediately complete the first launch until you reach the menu.
4. Before connecting online, make sure your VPN is disabled and overlays are turned off for testing.

If the problem remains even after a clean installation, the likely cause is the network, firewall policy, or a specific conflict with another program.

Quick diagnostics in 5 minutes

This mini plan is designed to quickly eliminate the most common causes when you are short on time and simply want to connect to a lobby. The idea is straightforward: spend five minutes checking the three most common areas—updates, files, and connection.

1. Restart Steam and your computer, then try connecting online.
2. Check for an Among Us update, then verify the integrity of the game files.
3. Disable your VPN if it is enabled and briefly test the connection through a browser.
4. Check the Windows time: automatic synchronization and the correct time zone.
5. Temporarily close overlay and recording programs, then try again.

If the error remains after completing these steps, move on to the A/B test. It will most likely reveal whether the problem is with the network or the computer.

A/B test in 10 minutes

An A/B test means changing one variable and checking whether the anti-cheat error changes. This avoids a situation in which you change many things at once and no longer know what helped. The goal of this test is not to fix the issue immediately, but to quickly identify the right direction so that you can take precise steps afterward.

Test A: another internet connection

1. Connect to a phone hotspot or another Wi‑Fi network.
2. Launch Among Us and try connecting to a lobby.

If it works through another internet connection: the problem is very likely within your home network. Focus on restarting the router, changing DNS, reviewing firewall rules and security filters, and checking whether the network has additional restrictions such as a parental control profile.

If it still does not work through another internet connection: the problem is more likely related to the computer, files, permissions, or a software conflict.

Test B: the same internet connection, another computer

1. If possible, launch Among Us on another computer connected to the same network using your Steam account.
2. Try connecting online.

If it works on another computer: your main computer has a block or conflict. Return to the firewall, antivirus, Windows Security, overlays, and clean boot steps.

If it does not work on another computer either: the problem is most likely on the network side. A comparison with a hotspot is especially important here because it helps distinguish ISP or router filtering.

Test C: overlays and background programs

1. Close programs that commonly run in the background: recording, overlay, monitoring, macro tools, and RGB control programs with additional modules.
2. Launch only Steam and Among Us.
3. Check whether the anti-cheat error recurs.

If the error disappears: enable the programs one at a time and identify the conflict. Then leave the conflicting program disabled while playing or update it to the latest version.

How to quickly interpret the A/B test

• Works through a hotspot but not at home: focus on the router, DNS, filters, network policy, and the load created by other devices on the network.
• Does not work through a hotspot either: focus on files, permissions, Windows Security, overlays, and antivirus software.
• Works on another computer on the same network: this is almost always a computer configuration issue rather than a router issue.
• Does not work anywhere for anyone on that network: look for network filters, DNS problems, or ISP restrictions.

Windows, Steam, and permissions: the most common places where verification gets stuck

An anti-cheat error often looks like a mysterious message, but in practice it frequently comes down to simple things: whether the program can access its files normally, whether it can communicate with the servers, and whether it is being blocked by security layers. This section is brief but practical.

Check where the Steam library is installed

If the Steam library is on a non-standard drive with restricted permissions, encryption, or special protection, unusual conflicts can sometimes occur. A safe test is to leave the library where it is but make sure that the drive is not set to read-only and that your user account has full permissions.

Check whether the Among Us folder is marked as read-only

If the anti-cheat error appears after you manually copied files or used backups, the folder may be marked as read-only. In that case, the game cannot update certain files normally, and verification detects a mismatch. The best solution is not to repair the files manually, but to restore everything through Steam file integrity verification.

Steam beta and experimental features

If you use the Steam beta and the anti-cheat error appeared recently, it is worth switching to the stable Steam channel for testing. This is not a universal rule, but it is a simple A/B change: one variable changes, and the result points you in the right direction.

Network diagnostics without complicated changes

When the A/B test shows that the problem depends on the network, you do not need to dive into complicated settings immediately. Three safe actions are usually enough: restarting, standardizing DNS, and reducing network load.

1) Restart the router properly

1. Turn off the router.
2. Wait about 30 seconds.
3. Turn it on and wait until the internet connection is fully restored.
4. Try connecting to Among Us online.

If the router has been running for a long time without a restart, it may have stuck sessions or an overloaded state. This is especially noticeable when the error appears only occasionally or only in the evenings.

2) Standardize the DNS settings

If your home network uses a non-standard DNS or a protective DNS service with filtering, anti-cheat verification may sometimes get stuck. A safe test is to temporarily set DNS to automatic or use a reliable public DNS. The specific choice is less important than ensuring that it is stable and does not have additional filters.

3) Reduce network load during the test

If downloads, updates, or streaming are active at the same time, the connection may experience packet loss or spikes. Anti-cheat verification can sometimes be more sensitive to brief connection interruptions than the game’s initial connection itself. Pause large downloads for five minutes during the test, then try connecting again.

Common troubleshooting mistakes

• Random fixes from the internet: unknown files or installers often pose a security risk and may further disrupt the client. If a solution asks you to download an exe or dll from an unknown website, that is not a normal approach.
• Trying to modify game files manually: this is almost guaranteed to create more mismatches and anti-cheat errors. The safest approach is Steam file integrity verification and reinstallation.
• Disabling the firewall instead of creating rules: it may briefly appear to help, but it is a bad habit. The correct step is to allow specific programs rather than removing all protection.
• Making too many changes at once: DNS is changed, antivirus is disabled, the game is reinstalled, half the settings are deleted, and you no longer know what worked. Make one change, test it, and then continue.
• Ignoring the time and updates: an outdated Windows installation or incorrect system time may seem unrelated, but they can cause genuine authentication problems.
• An imprecise symptom description: it will be difficult for support—or even for you—to help if you only write that it displays an error. The difference between immediately returning to the menu and disconnecting after 20 seconds is critical.
• Leaving overlays enabled while blaming the network: if the A/B test shows that the game does not work through a hotspot either, it is very likely a software conflict. Disable process-interfering tools first, then troubleshoot the network.

When to contact support and what to collect

If you have verified the integrity of the Steam game files, tried another internet connection, and the anti-cheat error still recurs, it is worth contacting support. To receive a faster response, collect specific facts rather than providing only an emotional description: when it happens, how it happens, how often it happens, and under what conditions.

When it is time to contact support

• It still recurs after a clean installation: you reinstalled the game, verified the files, and the error remains the same.
• The A/B test points in a clear direction, but you cannot fix it: for example, it works through a hotspot but not at home, and you have already tried changing DNS and restarting the router.
• The error appeared after an update and does not disappear for several days: collecting logs and version information is especially useful here.
• A corporate or school network policy is suspected: if you are not playing at home, support may tell you what is required, but you will often also need help from the network administrator.

What to collect before contacting support

• Exact symptom: when the error appears—when launching online mode, while connecting to a lobby, or after a certain amount of time—along with whether it happens in every region.
• Platform and OS: Steam, Windows 10 or Windows 11, and whether there have been any recent updates.
• A/B test results: whether it works through a phone hotspot, whether it works on another computer on the same network, and whether the error disappears after disabling overlays.
• List of attempted fixes: what you have already done, such as verifying file integrity, disabling your VPN, creating firewall rules, or clearing the download cache.
• Time and region: the approximate date and time when the error recurred and the server region you tried.
• Player.log: Player.log is often a useful file, and you can usually find it at this path: %USERPROFILE%\AppData\LocalLow\Innersloth\Among Us\Player.log
• System information: a DxDiag report or Steam system information so that support can see the driver and OS status.

Short support message template

A structured message helps when contacting support. Here is an example of what it could look like:

• When and where: date, time, and selected region.
• What happens: the anti-cheat error appears immediately when connecting to a lobby or disconnects you after a certain amount of time.
• What I have already done: file integrity verification, restart, VPN disabled, firewall rules created, and download cache cleared.
• A/B results: whether it works through a hotspot and whether it works on another computer.
• Attachments: Player.log and DxDiag.

This type of description almost always reduces the amount of back-and-forth because the support team does not have to guess whether you have already completed the basic steps.

Quick checklist

• Among Us and Steam updated, computer restarted
• Steam game file integrity verified
• Steam download cache cleared if the update was stuck
• VPN and proxy disabled, connection simplified for testing
• System time synchronizing automatically
• Among Us and Steam allowed through Windows Firewall
• Windows Security checked for Controlled folder access blocks
• Antivirus quarantine and permissions for official files checked
• Unnecessary overlays and background programs disabled, A/B test completed
• If the anti-cheat error still appears, Player.log and a list of attempted fixes prepared for the support team

If you want the fastest possible result, follow one rule: one change, one test. With an anti-cheat error, this is exactly what helps you find the real cause instead of simply stumbling upon a temporary fix by chance.