A technician has just finished installing a secondary OS on a workstation. After rebooting the computer, the technician receives the following error: No OS found. The technician confirms the…

The correct answer is C. An incompatible partition is marked as active. The BIOS/firmware hands off control to whichever partition is flagged as 'active' (the bootable partition). If the wrong partition - such as the new secondary OS's partition or a partition without a valid boot sector - is marked active, the firmware cannot locate a valid boot…

Hardware and network troubleshooting

Question

A technician has just finished installing a secondary OS on a workstation. After rebooting the computer, the technician receives the following error:

No OS found. The technician confirms the boot.ini file is correct. Which of the following is MOST likely causing this error?

Options

AThe computer has GRUB Legacy installed
BWindows Startup services are not running
CAn incompatible partition is marked as active
DAn unsupported version of Windows is installed

How the community answered

(59 responses)

A
5% (3)
B
10% (6)
C
68% (40)
D
17% (10)

Explanation

The BIOS/firmware hands off control to whichever partition is flagged as 'active' (the bootable partition). If the wrong partition - such as the new secondary OS's partition or a partition without a valid boot sector - is marked active, the firmware cannot locate a valid boot loader and throws 'No OS found.' Since boot.ini is confirmed correct, the boot configuration data itself is not the culprit. GRUB Legacy would present a GRUB menu or a GRUB error, not 'No OS found.' Windows Startup services are loaded post-boot and cannot cause a pre-OS error. An unsupported Windows version would typically produce a different, more specific error message during setup, not a 'No OS found' at boot time.

Topics

#dual boot#active partition#boot configuration#boot.ini

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