You can try the t'shooting/tweaking tips mentioned here - click here about
"Optimizing your system for better sound performance" from the Creative website as you've got one of their sound cards.
Note one important consideration when making any changes: "If changing one specific setting does not resolve the difficulty, it is recommended that you change it back to the previous setting, or the default setting, before proceeding with a different configuration."
Oh! and leave poor Dad alone. Your fault alone for letting him lose on your PC ; } . It may be worth your while to tell him to join this Forum. Any future 'disasters' & we lot may be able to remedy them before the prodigal son returns to pummel him into submission!