Recdiag.dll -

Open the Command Prompt as an administrator and run sfc /scannow . This tool scans and repairs corrupted Windows system files that might be interfering with the DLL's execution.

Invalid references in the Windows Registry pointing to a file location that no longer exists. How to Fix recdiag.dll Issues recdiag.dll

If the error started recently, use a System Restore Point to return your computer to a state where the software was working correctly. Open the Command Prompt as an administrator and

Run the System File Checker: