I found a disc in my pcs box which says: "VIA-RAID Driver-32bit 9D0-144-M00-0070 Note:In BIOS, enable SATA/RAID Initiate OS Installation Press F6 when requested. Insert the disk, press enter. Press S to select driver." Only problem being that I didn't enable SATA/RAID, and I didn't find the disc that early, so the OS is already installed. How do I fix this?