Lost sound in Linux Mint 10

allthumbs

Lost sound after downloading MP3 using Sound Recorder. Tried playing on other computer but no sound was recorded. Went to Control Center and sound and changed the Hardware settings to see if I could get it to record sound. Tried several settings but no sound. Now there is no sound from my speakers at all. No startup sound, Utube sound and can't play music. Went back into Sound Hardware settings and tried them all but failed to get sound back. I have dual boot with Windows XP Home/Linux. Sound still works fine in Windows XP.

I am running HP Compaq Presario, AMD Athlon 64 Processor 3400+, BIOS Ver. 3.36

Board MSI Ametyst-M