Truthfully with a all-in-one system like that I would stick with Windows 7. From Sony's website it looks like Windows 7 x64 is the last OS that even has drivers for that system and it came out with Vista. the BluRay player not working is kinda strange as most DVD/BluRay Readers/Writers us Microsoft default drivers there for should work just fine with Windows 8. So my best guess would be that it uses a custom firmware that is making it incompatible with Windows 8. But it would help to know the make/model of the BluRay player itself.