If you installed both of Foxit reader and abode reader. Please check it and remove 1 program for open pdf file. Have many idea that both of them sometime cannot used at the same time.
Many factors can prevent a PDF from opening in Adobe Reader or Acrobat, including these:
The PDF is damaged.
The Reader or Acrobat installation or update is damaged.
Reader or Acrobat is out of date.
File type is unrecognizable.
PDFs were created with non-Adobe programs.
Try the suggestions below as your first troubleshooting steps.