Slatep

Hello,I have a problem. When I try to open a Adobe Reader document (PDF) I get an error: The Adobe Reader can't run on your PC.This started after I upgraded from the trial Win 8.1 to the full release of 8.1 a couple of weeks ago. I'm using Adobe Reader DC (2015.0), and everything works fine I've tried uninstalling Office and re-installing. No help. Why does the program give me this pop up every time? Any suggestions? Thanks