@Diamondlea2 , Sims 3 and Sims Medieval share the same game engine. However, here is the latest thread on how to get SIms Medieval to work on Windows 10.
I had this problem when trying to install the sims medieval through origin. I have been trying to figure out a fix for over a year now. I have a windows 10. Tried to upgrade directx but it said I had a newer version. I read somewhere that the directx file was the same as sims 3. I happen to have sims 3 installed by Origin and it works great. So I went into the program files to where sims 3 was installed and went ito game/installer and copied the directx file and pasted it in program files where sims medieval is installed. After that I got on to origin launcher and tried to install again and this time it installed. This is the only way I have been able to fix the problem. However without Sims 3 installed and coping the file over, I don't know of another fix. Also don't know if it would work with a disc version of the sims 3. So I don't think redownloading and all the options that EA gave to try to fix it will work. When origin trys in install the sims medieval the directx file is somehow corrupted. It needs to be fixed by Origin or by replacing it. At least that is my opinion.
@shandra2583 , thanks for sharing your experience. I will keep this in mind.
