High Definition Audio not working. [SOLVED] I know there's already a thread about HDA not working, but this is slightly different. Basically, I have no sound on one machine, despite the fact the manufacturer listed is Microsoft. That's the only information given which I could identify it with, other than HDA. I think what I'm really asking first is 'how can I better identify the device?'. I find it really strange that the Microsoft HDA doesn't work, yet my other machine works perfectly fine, but which also has a Microsoft HDA card (I wouldn't know if they are the same, but I highly doubt it as they're two totally different machines). EDIT: Attached screenshot of Device Manager's info.