Just bought a new Inspiron 3000 series yesterday for my dad he tried out the windows 10 os it came with however he did not like the program so I put a spare hdd with windows 7 in the system. However I t will not read it as a bootable device. It is being detected in bios but still is not being read as bootable. Would like to know what to do, I know the drive is still good it was in my gaming pc prior and working fine so would like to know why the dell is not reading it.
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