Customers trying to get unsupported CCDOPs 5.56 Built 1 to run on Windows 10 may encounter an error indicating that msvcr100.dll is missing on their system, especially if it is a new install of Win 10. Microsoft Windows 10 does not ship with Visual Studio run time dlls. You can find the Visual C 2010 Runtime Redistributable here: https://www.microsoft.com/en-us/download/details.aspx?id=26999 You want the vcredist_x86.exe version. Download and install that. Then your CCDOps is likely to work. We also recommend running Windows Update to get the latest updates to your system.