i had a similar issue
heres what i had to do to resolve them
first i had to change bios settings to legacy support
then i had to select usb and boot from it
it would give error at windows 7 installation
the solution to that was to cancel and get back to install now point and change the usb to a different port and then it would proceed.
thereafter it wouldnt allow to install on any of the partitions because it was gpt, so had to format all partitions, and then it allowed me to proceed with windows 7 installation