Windows XP Home Edition - No Drivers.

Question

Greetings..I bought a compaq computer tower and it allready has Windows XP Home Edition on it. But the thing is. This compaq tower did not come with a back up disk. My daughter has destroyed three computers we have given her, but when we power up the computer it has a gadet called system restore. but not all of the drivers are still in the computer. Is there a way some one can send us a back up file for Windows XP Home Edition so that we can keep a copy of it on a cd?