Most classic OPC DA clients require .NET Framework 3.5 to be active for core communication services.
You must log on with an Administrator account to modify system registry entries and DCOM settings. 2. Installation Process
If you absolutely must keep the FactorySoft Client running, do not try to force it onto Windows 10. Instead, use VMware Workstation or Hyper-V . Create a Windows XP Virtual Machine, install FactorySoft there, and network it to your control system. This preserves the software in the environment it was designed for, while running on modern hardware.