Problem viewing Adobe since upgrading to Windows 10 from Windows 8

I currently have Adobe Acrobat XI, Version 11.0.17 installed on a PC. Since upgrading to Windows 10 on my PC, viewing PDFs both in Reader and Acrobat Standard are barely visible, almost like trying to view through tissue paper. Functionality is still there, I just don't have clear visibility.This version worked perfectly before upgrading the Windows 10. How do I restore the clarity? Thanks