Below is a list of suggested actions for troubleshooting a computer not booting from the correct drive:

1. Verify that the correct drive is listed first in the boot order in the BIOS settings
2. Confirm that the correct drive has a valid bootable operating system installed
3. Run a startup repair to troubleshoot possible drive or hardware configuration issues
4. Reinstall the operating system on the correct drive if necessary
5. Replace the drive or motherboard in case of hardware failure