I have the same issues with windows 8.1 64 bit. I tried reducing the resolution but that messes other software visibility. Tried contacting ancestry support, they suggest calling Microsoft (right!). Unable or have not seen how to change font size to 149%. If anyone has a solution, I would be appreciative. To mitigate the display issues I have been opening FTM, opening a tree, close the tree, reopen the tree. Display is much better, text boxes not overlayed, but only able to show 3 generations.