This is where I boot up a Live Linux CD/DVD. NO INSTALL REQUIRED and there are dozens of what they call DISTROS out there. If none work then it's likely some hardware failure is the cause and not a driver.

The good news is that USB Audio is cheap (under 10 bucks) and you can avoid the usual many hundred buck repair.

I'm taking your word you tried everything and it's not the volume set to low, muted or such. That is, you know your Windows and PC.
Bob

PS. No, you don't learn Linux. Read http://tips.oncomputers.info/archives2004/0401/2004-Jan-11.htm