Database login failed...issue with system.data.dll

We are utilizing Sage ERP 100 premium 5.10.40.  I have one workstation that keeps getting the following error any time they try to print or run a report:  "The database login failed.  Could not load file or assembly 'System.data.dll' or one of its dependencies.  is not a valid Win32 application.  (Exception from HRESULT: 0x800700C1)."   I have tried restarting, uninstalling and reinstalling the software, uninstalling and reinstalling crystal reports, and reinstalling the dotnet prerequisite.  Still no luck.  Any suggestions.