Work system library file is required when you try to run the latest version of the application or game that uses a new system requirements and the changed settings.
If you find inconsistencies, you can see a dialog box in which errors are reported containing a file name. Try to find it on the Internet, which offers wldcore dll download from various sources, select any one reliable and work with him.
How to download free wldcore.dll?
Save documents in his office computer and open the system folder, which contains the library files, and save to a new document, reboot your computer, and now the app should work fine.