Are 18 files failing to authenticate in Modern Warfare 2?
Are your MW2 files unverified on Steam on your PC?
If so, the game will crash when you try to play the campaign mode.
Here is the full error message, “18 files could not be validated and will be requested again”.
The error message occurs when you try to verify the integrity of game files on Steam.
In this guide, you will learn how to fix 18 files that failed to authenticate in Call of Duty: Modern Warfare 2 (MW2).
- Why 18 files fail to validate in MW2?
- How to fix error 18 files cannot be authenticated in Modern Warfare 2
Why 18 files fail to validate in MW2?
18 files failed to validate in MW2 due to an issue with the latest Nvidia drivers (version 526.47).
It could also mean that your anti-virus program is interfering with the files.
According to @BeenoxCODPC on Twitter, they say there is a stability issue with the latest Nvidia drivers.
They suggest keeping the driver 516.69 or 522.25 until Nvidia or MW2 fix the problem.
Many players are complaining about authentication issues.
“@ATVIAssist MW2 keeps flashing and steam says 18 files failed to authenticate. The files will not be requested again. Need help”.
“@CallofDuty @Steam I pre-booked the new Modern Warfare and I was enjoying it until my game crashed and it said “18 files could not be verified” and I couldn’t fix it. Is this a bug or do I need to change something on my PC?”.
How to fix error 18 files cannot be authenticated in Modern Warfare 2
To fix 18 files that failed to authenticate in Modern Warfare 2, you need to restore your Nvidia drivers to 516.69 or 522.25.
You also need to allow the game in your anti-virus program, including Windows Defender Firewall and Windows Security.
If all else fails, you can contact Activision support here: https://support.activision.com/.
Fix 1: Restore your Nvidia drivers
- Search for “Device Manager” using Windows Search and open it.
- Expand “Display Adapters” and select your GPU.
- Go to the “Drivers” tab and select “Back Driver”.
- Launch Call of Duty: Modern Warfare 2.
Fix 2: Allow game access on Windows Security
- Open Windows settings > Privacy & Security > Windows Security > Virus & Threat Protection > Manage Ransomware Protection > Allow Apps Through Controlled Folder Access Control > Add allowed apps > Browse all apps > select cod.exe app > Open.
- Add the rest of your .exe applications to Controlled folder permissions.
Fix 3: Allow the game on Windows Defender Firewall
- Open Control Panel > System and Security > Windows Defender Firewall > Allow an app or feature through Windows Defender Firewall > Change settings > Allow other apps… > Browse … > select the cod.exe application > Add.
- Add the rest of your .exe applications to your Firewall.
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Categories: How to
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