Hello, This is my first post here. Nice you meet you guys! I have an issue and I would really like your help. I recently bought a Dell XPS 15 9570 - Intel Core i7 8750H and I would like to install Windows 7 Ultimate. I know it's an old OS and that the support will end soon but I would really like to install Windows 7 Ultimate. However, after doing some research I found out that my CPU (?) it's not compatible. Apparently this is true because I enabled legacy mode on my BIOS and disabled UEFI and tried to boot from my Windows 7 Ultimate USB flash drive but I couldn't boot from it at all. It doesn't even recognize the USB. The laptop just says "Selected boot device failed. Press any key to reboot the system." That doesn't happen when I use the same USB drive but with Windows 10. Some people in different forums said it is possible to install it but that I'll have to make a "custom Windows 7 installation" or something like that with the USB 3.x drivers and the CPU drivers included in the installation files or install.WIM or something like that. I tried to ask them but those posts (reddit) were old and apparently those users are no longer active. I'm not a very advanced user and I would like to get some help. Is there any modified/custom Windows 7 Ultimate ISO out there that already includes the USB 3.x drivers and/or CPU drivers that I could try? I would be really thankful if you can help me. Thanks in advance for your help!