recdiag.dll is a Dynamic Link Library (DLL) file primarily associated with document processing software developed by Tungsten Automation

If you find recdiag.dll anywhere other than System32 or WinSxS , run a full Microsoft Defender or Malwarebytes scan immediately.

If this file becomes missing, corrupted, or incompatible, users may encounter various errors, often characterized by messages stating that the application failed to start because recdiag.dll was not found. What is Recdiag.dll?