If it's system sound try running System File Checker.
For the past couple of months, I've been losing system sound and the only way I've been able to restore it is to use System Restore to a point before I lost it.
This time I waited too long and can't get it back at all. I think this is an XP Home OS or software problem but have no idea where to start. I've reinstalled the es1371mp.sys file to no avail and am about to reinstall Windows XP in the hopes of finding my computer's voice again. I think this all stems from when I installed one of the many system updates but I can't pin down exactly which one.
Guidance or even ideas would be very much appreciated!