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220-1201 Practice Question: That their computer will not boot and displays an…
A user reports that their computer will not boot and displays an 'Operating System Not Found' error. They recently installed a new SATA SSD and connected it to the motherboard. What is the most likely cause?
⚠ Common exam trap
220-1201 often tests the confusion between a drive not being detected (cable/port issue) and a drive being detected but not bootable (boot order/partition issue), leading candidates to choose cable replacement when boot order is the fix.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The boot order in BIOS is not set to the new SSD.
When a new SATA SSD is installed and the system displays 'Operating System Not Found,' the most likely cause is that the BIOS boot order is not set to boot from the new SSD. Even if the SSD contains an OS, the firmware may still be trying to boot from the old drive or another device. Option C is correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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The SATA cable is faulty.
Why it's wrong here
If the SATA data cable connecting the SSD to the motherboard is faulty, the most common outcome is that the BIOS/UEFI will not detect the SSD at all. Without detection, the drive cannot be listed as a boot option, nor can the system attempt to load an operating system from it. While a faulty cable could also lead to intermittent read errors, complete non-detection is a more direct and frequent consequence, preventing any boot attempt from that specific drive.
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The SSD is not compatible with the motherboard.
Why it's wrong here
Modern SATA SSDs adhere to widely accepted industry standards (e.g., SATA III) and are designed for broad compatibility with motherboards equipped with standard SATA ports. True hardware incompatibility between a standard SATA SSD and a contemporary motherboard is exceedingly rare, especially if the drive is physically connected and powered. The system would typically still detect the drive, even if specific advanced features might not be fully utilized, making fundamental incompatibility an unlikely cause for a complete boot failure.
- ✓
The boot order in BIOS is not set to the new SSD.
Why this is correct
When a new SSD containing the operating system is installed, the BIOS/UEFI must be explicitly configured to prioritize booting from this specific drive. If the boot order remains set to an old drive, a non-existent device, or attempts to boot from a network, the system will fail to locate the operating system's bootloader on the new SSD. This common oversight results in errors such as 'No boot device found' or 'Operating System not found,' despite the OS being correctly installed on the new drive.
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The SSD needs to be formatted before use.
Why it's wrong here
An unformatted SSD would still be detected by the BIOS/UEFI as a physical storage device, appearing in the system's hardware list. However, without a file system and an installed operating system, the drive lacks the necessary bootloader and OS files to initiate the boot process. While the computer cannot boot from an unformatted drive, the issue isn't the formatting itself, but rather the absence of a bootable operating system, which is a separate step after formatting.
Go deeper
Related to this question
Learn chapter
Cloud Sync Tools: OneDrive, Google Drive, iCloud
Key term
SSD
A Solid State Drive (SSD) is a storage device that uses flash memory to save data, making computers start up and load files much faster than older hard drives.
Key term
Firmware
Firmware is specialized software permanently stored in read-only memory on a hardware device that controls how that device operates at a basic level.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
This 220-1201 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 220-1201 exam.