From helping other people on this forum with their issues in the two different versions of Windows, I've found that Windows 10 is a little more forgiving of the older games... to a degree.
Monokuroe and I did a few tests on some of the more common games people play in Windows 10 to see if they work, and what would happen with them.
http://aarinfantasy.com/forum/f49/t1...d-windows.html
There are obviously a lot of others missing, but a good portion of them do work in Windows 10.
The usual suggestions still work here... Don't install to the default location if you can help it (Outside of C:\Program Files (x86)\ ), make sure your System Unicode Locale is set to Japanese (Not just system location), and always try to find NoDVD versions of the game if you can.
^^