SCSI/RAID controller error

I had no idea where to post this thread so Im posting it here.for some reason when i went to my device manager one of my SCSI/RAID controller had a exclamation point by it.I decided to restart my computer and when I went back to device manager the same SCSI/Raid controller had a red x by it.Im not too good with computers so I have no idea what is a SCSI/Raid controller?somebody said it could be because I have daemon tool but I tried uninstaling and reinstalling it but that didnt work.can anybody tell me how I can fix this error

Edit:I have windows xp

 

A yellow '!' usually means the driver is corrupt or missing, or the device isn't installed or running correctly. A red 'X' means the device has been disabled. Right click the device in question in the device manager and select Uninstall. Now restart the PC. Windows should detect the device and reload the driver. If not, visit your motherboard maker's web site, download and install the chipset software and the RAID driver (maybe called SATA driver) if available. Let us know what happens. Good luck!

hd2k