SCSI/RAID Host Controller Driver Problem

Everytime I turn on my computer (Dell Dimension 5150), I get a 'New Found Hardware Device' for SCSI/RAID Host Controller. I found that SCSI/RAID Host Controller is disabled in Device Manager. When I enable it, it asks for '\Device\Harddisk1\DR3'. My motherboard details are posted below:

Manufacturer: Dell Inc.
Model: 0HJ054
Chipset: Intel i945G/GZ
Rev. A2
Southbridge: Intel 82801GB (ICH7/R)
LPCIOL: SMSC

Any help is appreciated :)

Hello

SCSI/RAID driver is usually found in your motherboard's installation CD. If you don't have one just go to your motherboard manufacturing website (this) http://support.dell.com/support/downloads/driverslist.aspx?c=us&l=en&s=gen&ServiceTag=&SystemID=DIMENSION%205150/E510&os=WW1&osl=en&catid=&impid and download the version according to your operating system.