| Issue | Likely Cause | |-------|---------------| | error on boot or when printing | Missing or corrupted Epson driver component | | Application failed to start because eprdll.dll was not found | A program (often an old printer utility) requires it | | High CPU usage by eprdll | Malicious masquerading process | | Windows cannot verify the digital signature | Tampered or malware file | 4. Investigation & Remediation Steps Step 1: Locate the File Open Command Prompt as Administrator and run: