Blue highlight in first cell in datagridview on form load

I have a winform with parent table textboxes on the top and two child datagridview's on the bottom.

When the form loads the cursor goes to a specific textbox on the form (which is not highlighted) but the first cell in both of the datagridview's are highlighted blue.

The problem is the user doesn't know where the cursor is when they load the form because of these distracting blue highlighted cells.

My question: is there a way to have the form only highlight blue the actual textbox or cell that the cursor is currently in?

Thanks,
Stacy