Might be too late but before you uninstall the Intel 82801DB Ultra ATA Controller, click the driver tab, I'm betting it will indicate Microsoft
version 5.1.2600.1106 dated 7/1/2001. The Intel Controller is using Microsoft drivers as it should be.
Check your add/remove programs and make sure it does not display "Intell Application Accelerator", this program creates conflicts. If you have it uninstall it.