ide controller driver (cannot find)

I have a dell inspiron 6000

In device manger under 'SCSI / Raid controller' I see IDE controller. But I have lost the driver and the computer can't find a driver to roll back to (not sure what happened). I have spent days looking for a driver online to no avail. I haven't found anything not working as such, but every time I turn the computer on it 'finds new hardware' and wants to search for a driver. Its very annoying I don't know why a driver is so difficult to find... I'm not even entirely sure what it does.

Please help! My warranty has expired and I refuse to pay for support just because dell is incapable of publishing a decent list of drivers

Thanks