windows 10 audio driver problem imac 2011

I have windows 10 on my mid 2011 imac. All the other drivers are working perfectly except for the sound drivers. I had windows 8.1 previously on this imac and the audio drivers did not work there either, so im thinking its something im doing wrong rather than the mac itself. All it says is "No speakers or headphones are plugged in" Is there a way to connect my internal speaker that I use on the mac OS to windows? Other people I've seen on these forums have the same imac model as me and their sound drivers work fine, so there must be a solution to this, right? Any help is always appreciated!