How did you deploy the application to the target system?
As you're using VS2015, I guess you didn't add the "Runtime .NET Deployment manifest", right?
You just copied the app from bin\debug to the target system?
If so, I guess you've been targeting "Any CPU" and only the 64-bit version of the runtime got included. Take a look at the bin\Debug\client32 folder. If it's empty, there's no 32-bit version.
So either go to official VS2013 and at the deployment manifest, or try to compile targeting x86.