IS-FC05: Couldn't verify hash serialization

This error occurs when you have a valid file and file size but the file’s hash value is incorrect. This can be caused by your hard drive using the incorrect file system required to install your game or faulty memory.

Verify your hard drives are using the NTFS file system

To check the file system that your hard drive(s) are using use these steps:

  1. Click on Start.
  2. Type This PC and press Enter.
  3. Right-click on your hard drive and click on Properties.
  4. The file system will be listed under the Type. If this says NTFS you’re using the correct file system. If this says FAT32 you’ll need to convert the hard drive to NTFS. 

Perform hard drive test

Hard drives sometimes have errors that can be resolved by checking them using CHKDSK. To check your hard drive, please complete these steps:

  1. Click Start.
  2. Type cmd.
  3. Right-click Command Prompt and then click Run as Administrator.
  4. Type chkdsk c: /r /f and press Enter.
    Note: You can run this command for any hard drive by replacing c: with d:, e:, etc.
  5. Press Y and then Enter to allow your hard drive to be checked when you restart your computer.
  6. Restart your computer.

Please note that you only need to restart if you check the hard drive your operating system is running on. This process may take some time to complete. If you receive any errors, it should repair these during the process. Once this is complete, try to install your game again.

Perform memory test

This error is a sign that you may have a bad RAM in your computer. You should perform a memory test within Windows to determine if you need to replace your memory. 

  1. Click on Start.
  2. Type Windows Memory Diagnostic and press Enter.
  3. Select Restart Now and check for problems.

If any errors are found you’ll need to replace your memory and try installing your game again afterwards.

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