Have you tried installing the latest Via 4 IN 1 drivers?
I had this problem before, twice and once was solved by replacing the PSU then the next was solved by replacing the memory. But this is not your problem so...Have you overclocked anything lately? Does your sound loop as well?
Have you tried a Virus scan? You say when your using it...Could be that a component in your computer is going bad (hd, cpu) Do you hear any noises when this happens? Checked the cabling? Runned ScanDisk?
I had this problem before, twice and once was solved by replacing the PSU then the next was solved by replacing the memory. But this is not your problem so...Have you overclocked anything lately? Does your sound loop as well?
Have you tried a Virus scan? You say when your using it...Could be that a component in your computer is going bad (hd, cpu) Do you hear any noises when this happens? Checked the cabling? Runned ScanDisk?