Microsoft Visual Studio 2017 C++ Redistributables allows people to run software that was compiled for Windows using the Microsoft 2017 C++ compiler. You will need to download and install the 64-bit redistributables. This only has to happen once, when you first install Gorman Print Control on a computer. IF YOU EXPERIENCE AN ERROR ABOUT A MISSING FILE SUCH AS MSVCR120.DLL WHEN STARTING GORMAN PRINT CONTROL, THE MOST LIKELY CAUSE IS THE MICROSOFT REDISTRIBUTABLES ARE NOT INSTALLED. The redistributables are free for anyone to install, and may be download directly from Microsoft at this location: https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads The MD5 checksums for the 64-bit redistributables are as follows: 7c3e0bfd83d985c9651e8150fca3e84d VC_redist.x64.exe Download and install the redistributables directly from Microsoft (e.g., see the URL above), or from the cached version on the C Code Run web site. Stephane Charette 2018-Feb-07