220-1102 · Question #782
A technician discovers a user's PC has a "No OS found" error message. Which of the following steps should the technician take next?
The correct answer is A. Remove external storage and reboot the PC. A 'No OS found' error at boot most commonly occurs when the BIOS/UEFI attempts to boot from an external or removable storage device (USB drive, external HDD) that does not contain a bootable OS, instead of the internal drive. The simplest first troubleshooting step is to remove…
Question
A technician discovers a user's PC has a "No OS found" error message. Which of the following steps should the technician take next?
Options
- ARemove external storage and reboot the PC.
- BReplace the SSD and run disk defragmenter.
- CStart up in safe mode and roll back the latest security updates.
- DBack up personal data and rebuild the user profile.
How the community answered
(25 responses)- A76% (19)
- B12% (3)
- C4% (1)
- D8% (2)
Explanation
A 'No OS found' error at boot most commonly occurs when the BIOS/UEFI attempts to boot from an external or removable storage device (USB drive, external HDD) that does not contain a bootable OS, instead of the internal drive. The simplest first troubleshooting step is to remove all external storage devices and reboot to allow the system to boot from the internal drive. Replacing the SSD, rolling back updates in safe mode, or rebuilding a user profile are all more invasive steps that should only be considered after ruling out simpler causes like an incorrect boot device.
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