When I got screen capture working I also noticed the mouse pointer was invisible. Found I could fix that by going into Win10 settings/devices/mouse/"adjust mouse & cursor size" and increase the mouse pointer size from 1 to 2.
Howard, thanks for the idea. Strangely, I do not find any such "adjust mouse & cursor size" in my windows 10. Alternatively, I clicked on the "add cursor tail" (part of the setting in the mouse hardware settings screen) and set it to relatively short (the long tail looks ugly) and it got captured in my screen captures. Ideally, they need two BASIC options, cursor capture on/off and screen cropping.
@CurtisBro on my Win10 v1903 "adjust mouse & cursor size" is on the far right side of the screen under "related settings"... you might need to go full screen on that panel to keep the right-hand side of the screen from being clipped off. You can also accomplish pretty much the same thing choosing mouse in the Windows control panel, then under the pointers tab, by selecting either a large or extra-large scheme... this is older way to do it and is probably the same going back to Win7 and XP.