Help me fix my sound xxx

Hello, My question is how do i return back to my original sound settings? x Reason being i recently gave my laptop a full system restore using 3 emachines restore discs problem is my laptop is a e-system 3115 so now my laptop thinks its my old computer if u see wot i mean which did use speakers 4 sound x I have tried 2 download the e-system but had no luck so far and i cnt find the original e-system disc
HELPPPPPPPPP ITS REALLY ANNOYING ME Thx x Ps any free downloads u know of would be really appreciated thx agen x