Problem booting Win10 from USB flashdrive

[Alliord]

Hello:

First of all, thank you for your time and for trying to help me out. I recently purchased a brand new motherboard, RAM, and CPU for my old computer. I also got Windows 10 and created a bootable USB flashdrive with it. When I turn on the PC I press F12 to go to the Boot Setup, I choose to boot from USB flashdrive, the PC reboots but then tells me that Windows can't startup (also, it seems as if my old OS Win7 is the one booting), and it gives me the options to run "repair mode" or "start widnows normally". If I choose "start windows normally" it takes me back to the same screen that it is unable to start.  If I choose "repair mode" it pops up a "Startup Repair" window attempting to repair and offered me to do a restore but I declined it, and then took a while attempting to repair but in the end did not find any solution. 

 

What I would like is to delete entirely my HDD, install Windows 10, and have my PC as if it was brand new.

 

Link to my PC specifications:

http://h20564.www2.hp.com/hpsc/doc/public/display?docId=c01403218

Changes to the PC:

     Current OS: Win7 (SP1)

     New MOBO:

     https://www.amazon.com/dp/B0165YUDTM/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=AZWW7MPMRRV8&coliid=I1C4OQDA41B2P9&tag=linus21-20

     New CPU:

     http://ca.pcpartpicker.com/product/hV7CmG/intel-cpu-bx80662i36100
     RAM: one 8gb stick

     PSU: 400W

 

I created the bootable USB flashdrive on a mac and this is the video I watched and followed to create it:

 

Please I will appreciate any help to resolve my problem. If you need to know anything else to be able to help me out just ask.

[NelizMastr]

You could run a Windows VM on your Mac and use mediacreationtool from the Microsoft website with your flash drive directly attached to the VM, or burn a DVD instead. The Win10 ISO can be downloaded from the Microsoft website as well and burned with the Burn program (I don't recommend burning with disk utility).

The reason your 7 won't boot is because of incompatible chipset drivers in most cases. Win7 and Skylake are not a very happy combination.