Operating System Not Found?



As part of a system upgrade, you’ve removed the SATA hard drive of a desktop computer and replaced it with a new SATA drive purchased from a local retailer. When you start the computer, you receive the message “Operating System Not Found.” What is the most likely problem?

A) The computer’s power supply can’t support the new SATA drive

B) The SATA cables have not been connected correctly

C) The BIOS of the computer needs to be upgraded

D) Another component is conflicting with the new hard drive


The answer: B) The SATA cables have not been connected correctly

When a BIOS can’t locate a bootable system, it gives an error message that operating system is available from which to boot. We know that the computer will work SATA drives, and the replacement doesn’t require any change to the cabling or power connections. The most logical next step is to check the cables to be sure they were installed properly onto the new drive.

The incorrect answers:

A) The computer’s power supply can’t support the new SATA drive
Most single SATA drives have similar power requirements, so it would be unusual for a new drive to require more power. If the original drive was working properly, then the new drive should have plenty of power.

C) The BIOS of the computer needs to be upgraded
The BIOS of a computer doesn’t usually require any modifications during an upgrade. There are rare occasions where an increase in hard drive space or memory can only be completed with an upgraded BIOS; these situations aren’t the norm.

D) Another component is conflicting with the new hard drive
Although hardware incompatibilities can occasionally cause problems with operating system resources, replacing one SATA drive with another doesn’t usually cause any major issues.

Want to know more? Watch “SATA Drive Technology.”


Serial ATA is the latest standard in high-speed hard drive storage, and it’s used in both large enterprise networks and consumer laptops and desktops. In this video, we’ll show you how SATA cables and configuration options are different than other available storage formats.