You can get the drivers and the utilities from the manufacturer's website. Just download them on another PC, copy them to this one and install them.
If you have the disks that came with the PC, they should be there. If a different OS version, just use the closest OS version to the one that you have, i.e. if you have WIn7 64bit you can use Vista 64 bit drivers.
Also, for Win7, it is pretty good in finding drivers online by using Windows Update.