how do i download mask of eternity to dos box and is this my best solution to play on windows 10
thank you

I download the game through GOG Galaxy to my Windows 7 computer and the game runs just fine without issues. Not sure about Windows 10, though.

I suggest reading through this forum as there are threads about running the game in Windows 10.

This game is difficult to get running on a windows 10 pc, but it's possible. I used this guide:

https://www.speedrun.com/Kings_Quest_Mask_of_Eternity/guide/ok53a

Only problem is that the screen turns black after the intro movie and you have to restart it. Anyone know of a way to fix that?

Yes, set the compatibility to Windows 95