Your motherboard is only last years model, its not outdated at all. UNless he means the bios and that shouldn't stop it installing with that CPU, only if you had a 7 series CPU would that be a problem.
Your manual
go into the bios and on the boot tab (in advanced view) turn off fast boot if its enabled. with it enabled, the PC might ignore any USB devices attached except keyboard and mouse
make sure USB (if a choice called UEFI USB is there, choose it) is top of boot priority
did you make the flash drive or buy it with windows on it?