There is a know issue with check boxes in grid controls not being visible if certain Windows settings are used.  Here is a list of what setting that cause this issue and recommendations that may fix this problem.

  1. If the Windows Theme is set to "Windows Classic".
  • Recommendation: switch to another theme.
  • If the Windows Visual Effects is set to "Adjust for best performance".
    • Recommendation: use the "Let Windows choose what's best for my computer" setting