|Thanks for the Thanks|
If you have a generic desktop system....
The detailed info about how you set the SATA controller mode or similar - it varies depending on the bios version - is probably in the manual for your retail mboard model, in the descriptions of settings in the bios.
If you need help with that, you must provide us with the make and model of your mboard.
The model, sometimes the make, of a mboard in a generic desktop system is usually printed on the mboard's surface in obvious larger characters, often between the slots.
If you have a brand name system, in most cases, unless, possibly, if you have a Dell computer sometimes that info is it the manuals for the model, we can't find the details about that on the web.
Whatever the setting is, it's presently set to SATA or AHCI mode or similar, it's changeable, and at least one other choice is an IDE compatible mode of some sort - e.g. IDE, EIDE, ATA, PATA, Compatible, etc.
The specific model of a brand name system is often shown on a label on the outside of the case somewhere, or it can often be determined by going to the brand name's web site and loading a program they have available, if Windows is still working, on the subject computer.
If it's a Dell computer...
Go here for how to find the Service tag "number":
Tell us what it is.
If it's a HP or Compaq computer.....
Scroll down a bit.
Look for the similar label on the outside of your computer.
Quote the specific Model number
Quote the Product number (P/N)