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Reboot and Select proper Boot device
or Insert Boot Media in selected Boot device

Cause:

The boot record could not find a bootable partition so control was passed back to the BIOS. This issue occurs prior to the start of any Windows code.

It can be caused by a power-failure while the disk is in the middle of writing, a virus damaged the entry, a failing disk drive or a serious software bug damaged the partition entry (although Windows typically protects against this). This issue cannot be easily caused by any action you performed, unless you turned off the power without going through Windows shutdown.

Workaround:

1. If you had changed, added or removed hard drives, or changed or removed drive cabling, likely something is wrong. Recheck that the drives are properly installed and the cabling has not changed. Switching cables to different motherboard connectors or changing the master/slave drive jumpers (on old ATA drives) can cause this problem. In some systems, the cables were not plugged into the drive or motherboard securely and may have worked loose. Reseat all drive connectors.

2. It's also possible a hard drive is failing. Use a system diagnostic to validate the drive or swap to another hard disk.

3. If the first bootable drive is missing (disconnected or dead) the BIOS may be attempting to boot from a second disk. Confirm the primary drive is working.

 

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