Note: Avoid downloading DLLs from third-party "DLL fixer" sites as they may contain malware. It is safer to copy the file from another machine with a working Corel X7 installation. Re-register the DLL
The error is a classic example of legacy DRM clashing with modern Windows security. While frustrating, it is entirely fixable through a combination of antivirus exclusions, re-registering the DLL, and performing a repair installation. Psikey-2.dll Corel X7 64 Bit