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Posted 05 September 2015 - 07:29 AM
Posted 05 September 2015 - 07:59 AM
A BIOS will only actually show you drives in the equipment list when they are connected to an internal interface. However assuming you mean it won't boot from a USB drive there are some possibilities.
Firstly ensure it is a DVD drive not just CD, since a Windows 7 install disc will be a DVD.
Next to boot from USB you'll probably need to change the boot options in the BIOS. Reading suggests you should use F2 to access the menu, in Security disable Secure Boot State. On the Boot tab disable Fast Boot and enable Launch CSM. Save and Exit, then on boot press Esc to access the boot menu, select USB as the first boot device. Acknowledgement to Anshad Edavana if this is correct.
In extreme circumstances there is a claim that early BIOS versions would not boot from USB unless updated:
I cannot vouch from personal experience as to whether this is something you should consider if you are unable to get your unit to boot from the external drive.
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