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Steps to Fix For Windows Update Error Code 0x80096004 Error Code 0x80096004 is an error that occurs in the Windows operating system. Windows Update Error Code 0x80096004 generally indicates a problem with the digital signature of a file or application. A digital signature is a unique code that verifies the authenticity of a file or application. When Windows is unable to verify the digital signature of a file or application, this Windows 10/11 Update Error Code 0x80096004 is generated, stopping the file or application from being installed or executed.