I sort of need help with my sound.

In that there is none.

I was listening to a song (legally purchased/DL'd may I add), and the computer froze up. I rebooted. I then found no sound whatsoever. I have:

Checked volume
Installed latest drivers
Installed SP3, reinstalled drivers
Uninstalled/reinstalled other drivers
Tried ten sets of headphones/speakers. None give any sound at all