Got no sound device

Hello,
can anyone help with this problem???????? i have recently installed a new hard drive as windows proffessional crashed on me. i have had a copy of xp installed but cantt get any sound through my computer when playin any muysic or vids.. dont even get bleeps frompop ups. have looked for free sound drivers but cant seem to get anywhere.. can someonegive some advice to save me taking it into shop thanks clemo