Samsung CDRW/DVD SN-324B internal driver/firmware needed please

I incidentally updated my Samsung CDRW/DVD SN-324B internal driver with the

samsung sn-324s slim cdrw/dvd rom driver from the removable media storage devices section from drivers and downloads on support.dell.com. After upgrade the INTERNAL cd/dvd driver is shown as REMOVABLE!? It is no longer usable.

 

Can anyone help me get the right driver?