Any suggestion to try fix the issue?

even the previous version of flash, it doesn't work only for one PC and one this website.

http://sekai-kabuka.com/nikkei.html

OS: Windows 10,

Chrome, Firefox, IE, edge, all those 4 browsers,

Flash player and Silverlight plugin are properly installed.

it could be the issue of my graphic card, Geforce GTX460

ActiveX plugin are alll enabled by Internet Option. those are all fine tuned. it works for other flash web sites.