THANKS BEN. I HAVE TRIED TROUBLESHOOTING. UPDATING DRIVERS, UNINSTALL, REINSTALL ETC WITH NO LUCK. I HAD MS REMOTE ASSISTANT ON IT YESTERDAY BUT HE DID ALL THE SAME THINGS WITH SAME RESULT, HE WOULDNT CONFIRM OR DENY IT IS AN UPDATE ISSUE.
I USED MY PARTED MAGIC CD WHICH BOOTS FIREFOX FROM RAM AND THE SOUND WAS WORKING FINE SO THE PROBLEM HAS TO BE IN THE WINDOWS SYSTEM SOMEWHERE.
I HAVE HEARD FROM SOMEBODY WHO HAS SAME PROBLEM AND THEY HAVE DITCHED THEIR MOTHERBOARD THINKING IT WAS SHOT BUT THAT WAS A BIT DRASTIC SO I HOPE FOR A SOLUTION TO COME SOON
Press the Windows and "R" keys simultaneously, type "devmgmt.msc" into the "Run" box and click "OK". When Device Manager starts, expand "Sound, Video and Game Controllers", right-click the sound device, select "Update driver", "Browse my computer for driver software on my computer", then "Let me pick from a list of drivers on my computer". If one is found, install it. You may have to restart the computer for the change to take effect.
Thanks Mike, i have resigned myself to the fact that the internal sound card is dead so i took your advice and bought a cheap (less than 2quid) usb sound card and I'm pleased to say i can now use my headphones, thanks